projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
netfilter: nf_tables: add optional user data area to rules
[deliverable/linux.git] / net / netfilter / ipvs / ip_vs_ctl.c
CommitLineData
1da177e4
LT		 1/*
2 * IPVS An implementation of the IP virtual server support for the
3 * LINUX operating system. IPVS is now implemented as a module
4 * over the NetFilter framework. IPVS can be used to build a
5 * high-performance and highly available server based on a
6 * cluster of servers.
7 *
1da177e4
LT		 8 * Authors: Wensong Zhang <wensong@linuxvirtualserver.org>
9 * Peter Kese <peter.kese@ijs.si>
10 * Julian Anastasov <ja@ssi.bg>
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 *
17 * Changes:
18 *
19 */
20
9aada7ac
HE		 21#define KMSG_COMPONENT "IPVS"
22#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
23
1da177e4
LT		 24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/types.h>
4fc268d2 27#include <linux/capability.h>
1da177e4
LT		 28#include <linux/fs.h>
29#include <linux/sysctl.h>
30#include <linux/proc_fs.h>
31#include <linux/workqueue.h>
32#include <linux/swap.h>
1da177e4 33#include <linux/seq_file.h>
5a0e3ad6 34#include <linux/slab.h>
1da177e4
LT		 35
36#include <linux/netfilter.h>
37#include <linux/netfilter_ipv4.h>
14cc3e2b 38#include <linux/mutex.h>
1da177e4 39
457c4cbc 40#include <net/net_namespace.h>
9330419d 41#include <linux/nsproxy.h>
1da177e4 42#include <net/ip.h>
09571c7a
VB		 43#ifdef CONFIG_IP_VS_IPV6
44#include <net/ipv6.h>
45#include <net/ip6_route.h>
46#endif
14c85021 47#include <net/route.h>
1da177e4 48#include <net/sock.h>
9a812198 49#include <net/genetlink.h>
1da177e4
LT		 50
51#include <asm/uaccess.h>
52
53#include <net/ip_vs.h>
54
55/* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
14cc3e2b 56static DEFINE_MUTEX(__ip_vs_mutex);
1da177e4 57
1da177e4 58/* sysctl variables */
1da177e4
LT		 59
60#ifdef CONFIG_IP_VS_DEBUG
61static int sysctl_ip_vs_debug_level = 0;
62
63int ip_vs_get_debug_level(void)
64{
65 return sysctl_ip_vs_debug_level;
66}
67#endif
68
7a4f0761
HS		 69
70/* Protos */
578bc3ef 71static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup);
7a4f0761
HS		 72
73
09571c7a
VB		 74#ifdef CONFIG_IP_VS_IPV6
75/* Taken from rt6_fill_node() in net/ipv6/route.c, is there a better way? */
c24584c0
ED		 76static bool __ip_vs_addr_is_local_v6(struct net *net,
77 const struct in6_addr *addr)
09571c7a 78{
4c9483b2
DM		 79 struct flowi6 fl6 = {
80 .daddr = *addr,
09571c7a 81 };
c24584c0
ED		 82 struct dst_entry *dst = ip6_route_output(net, NULL, &fl6);
83 bool is_local;
09571c7a 84
c24584c0 85 is_local = !dst->error && dst->dev && (dst->dev->flags & IFF_LOOPBACK);
09571c7a 86
c24584c0
ED		 87 dst_release(dst);
88 return is_local;
09571c7a
VB		 89}
90#endif
14e40546
SH		 91
92#ifdef CONFIG_SYSCTL
1da177e4 93/*
af9debd4
JA		 94 * update_defense_level is called from keventd and from sysctl,
95 * so it needs to protect itself from softirqs
1da177e4 96 */
9330419d 97static void update_defense_level(struct netns_ipvs *ipvs)
1da177e4
LT		 98{
99 struct sysinfo i;
100 static int old_secure_tcp = 0;
101 int availmem;
102 int nomem;
103 int to_change = -1;
104
105 /* we only count free and buffered memory (in pages) */
106 si_meminfo(&i);
107 availmem = i.freeram + i.bufferram;
108 /* however in linux 2.5 the i.bufferram is total page cache size,
109 we need adjust it */
110 /* si_swapinfo(&i); */
111 /* availmem = availmem - (i.totalswap - i.freeswap); */
112
a0840e2e 113 nomem = (availmem < ipvs->sysctl_amemthresh);
1da177e4 114
af9debd4
JA		 115 local_bh_disable();
116
1da177e4 117 /* drop_entry */
a0840e2e
HS		 118 spin_lock(&ipvs->dropentry_lock);
119 switch (ipvs->sysctl_drop_entry) {
1da177e4 120 case 0:
a0840e2e 121 atomic_set(&ipvs->dropentry, 0);
1da177e4
LT		 122 break;
123 case 1:
124 if (nomem) {
a0840e2e
HS		 125 atomic_set(&ipvs->dropentry, 1);
126 ipvs->sysctl_drop_entry = 2;
1da177e4 127 } else {
a0840e2e 128 atomic_set(&ipvs->dropentry, 0);
1da177e4
LT		 129 }
130 break;
131 case 2:
132 if (nomem) {
a0840e2e 133 atomic_set(&ipvs->dropentry, 1);
1da177e4 134 } else {
a0840e2e
HS		 135 atomic_set(&ipvs->dropentry, 0);
136 ipvs->sysctl_drop_entry = 1;
1da177e4
LT		 137 };
138 break;
139 case 3:
a0840e2e 140 atomic_set(&ipvs->dropentry, 1);
1da177e4
LT		 141 break;
142 }
a0840e2e 143 spin_unlock(&ipvs->dropentry_lock);
1da177e4
LT		 144
145 /* drop_packet */
a0840e2e
HS		 146 spin_lock(&ipvs->droppacket_lock);
147 switch (ipvs->sysctl_drop_packet) {
1da177e4 148 case 0:
a0840e2e 149 ipvs->drop_rate = 0;
1da177e4
LT		 150 break;
151 case 1:
152 if (nomem) {
a0840e2e
HS		 153 ipvs->drop_rate = ipvs->drop_counter
154 = ipvs->sysctl_amemthresh /
155 (ipvs->sysctl_amemthresh-availmem);
156 ipvs->sysctl_drop_packet = 2;
1da177e4 157 } else {
a0840e2e 158 ipvs->drop_rate = 0;
1da177e4
LT		 159 }
160 break;
161 case 2:
162 if (nomem) {
a0840e2e
HS		 163 ipvs->drop_rate = ipvs->drop_counter
164 = ipvs->sysctl_amemthresh /
165 (ipvs->sysctl_amemthresh-availmem);
1da177e4 166 } else {
a0840e2e
HS		 167 ipvs->drop_rate = 0;
168 ipvs->sysctl_drop_packet = 1;
1da177e4
LT		 169 }
170 break;
171 case 3:
a0840e2e 172 ipvs->drop_rate = ipvs->sysctl_am_droprate;
1da177e4
LT		 173 break;
174 }
a0840e2e 175 spin_unlock(&ipvs->droppacket_lock);
1da177e4
LT		 176
177 /* secure_tcp */
a0840e2e
HS		 178 spin_lock(&ipvs->securetcp_lock);
179 switch (ipvs->sysctl_secure_tcp) {
1da177e4
LT		 180 case 0:
181 if (old_secure_tcp >= 2)
182 to_change = 0;
183 break;
184 case 1:
185 if (nomem) {
186 if (old_secure_tcp < 2)
187 to_change = 1;
a0840e2e 188 ipvs->sysctl_secure_tcp = 2;
1da177e4
LT		 189 } else {
190 if (old_secure_tcp >= 2)
191 to_change = 0;
192 }
193 break;
194 case 2:
195 if (nomem) {
196 if (old_secure_tcp < 2)
197 to_change = 1;
198 } else {
199 if (old_secure_tcp >= 2)
200 to_change = 0;
a0840e2e 201 ipvs->sysctl_secure_tcp = 1;
1da177e4
LT		 202 }
203 break;
204 case 3:
205 if (old_secure_tcp < 2)
206 to_change = 1;
207 break;
208 }
a0840e2e 209 old_secure_tcp = ipvs->sysctl_secure_tcp;
1da177e4 210 if (to_change >= 0)
9330419d 211 ip_vs_protocol_timeout_change(ipvs,
a0840e2e
HS		 212 ipvs->sysctl_secure_tcp > 1);
213 spin_unlock(&ipvs->securetcp_lock);
af9debd4
JA		 214
215 local_bh_enable();
1da177e4
LT		 216}
217
218
219/*
220 * Timer for checking the defense
221 */
222#define DEFENSE_TIMER_PERIOD 1*HZ
1da177e4 223
c4028958 224static void defense_work_handler(struct work_struct *work)
1da177e4 225{
f6340ee0
HS		 226 struct netns_ipvs *ipvs =
227 container_of(work, struct netns_ipvs, defense_work.work);
9330419d
HS		 228
229 update_defense_level(ipvs);
a0840e2e 230 if (atomic_read(&ipvs->dropentry))
f6340ee0
HS		 231 ip_vs_random_dropentry(ipvs->net);
232 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
1da177e4 233}
14e40546 234#endif
1da177e4
LT		 235
236int
237ip_vs_use_count_inc(void)
238{
239 return try_module_get(THIS_MODULE);
240}
241
242void
243ip_vs_use_count_dec(void)
244{
245 module_put(THIS_MODULE);
246}
247
248
249/*
250 * Hash table: for virtual service lookups
251 */
252#define IP_VS_SVC_TAB_BITS 8
253#define IP_VS_SVC_TAB_SIZE (1 << IP_VS_SVC_TAB_BITS)
254#define IP_VS_SVC_TAB_MASK (IP_VS_SVC_TAB_SIZE - 1)
255
256/* the service table hashed by <protocol, addr, port> */
ceec4c38 257static struct hlist_head ip_vs_svc_table[IP_VS_SVC_TAB_SIZE];
1da177e4 258/* the service table hashed by fwmark */
ceec4c38 259static struct hlist_head ip_vs_svc_fwm_table[IP_VS_SVC_TAB_SIZE];
1da177e4 260
1da177e4
LT		 261
262/*
263 * Returns hash value for virtual service
264 */
95c96174
ED		 265static inline unsigned int
266ip_vs_svc_hashkey(struct net *net, int af, unsigned int proto,
fc723250 267 const union nf_inet_addr *addr, __be16 port)
1da177e4 268{
95c96174 269 register unsigned int porth = ntohs(port);
b18610de 270 __be32 addr_fold = addr->ip;
e9836f24 271 __u32 ahash;
1da177e4 272
b18610de
JV		 273#ifdef CONFIG_IP_VS_IPV6
274 if (af == AF_INET6)
275 addr_fold = addr->ip6[0]^addr->ip6[1]^
276 addr->ip6[2]^addr->ip6[3];
277#endif
e9836f24
JA		 278 ahash = ntohl(addr_fold);
279 ahash ^= ((size_t) net >> 8);
b18610de 280
e9836f24
JA		 281 return (proto ^ ahash ^ (porth >> IP_VS_SVC_TAB_BITS) ^ porth) &
282 IP_VS_SVC_TAB_MASK;
1da177e4
LT		 283}
284
285/*
286 * Returns hash value of fwmark for virtual service lookup
287 */
95c96174 288static inline unsigned int ip_vs_svc_fwm_hashkey(struct net *net, __u32 fwmark)
1da177e4 289{
fc723250 290 return (((size_t)net>>8) ^ fwmark) & IP_VS_SVC_TAB_MASK;
1da177e4
LT		 291}
292
293/*
fc723250 294 * Hashes a service in the ip_vs_svc_table by <netns,proto,addr,port>
1da177e4
LT		 295 * or in the ip_vs_svc_fwm_table by fwmark.
296 * Should be called with locked tables.
297 */
298static int ip_vs_svc_hash(struct ip_vs_service *svc)
299{
95c96174 300 unsigned int hash;
1da177e4
LT		 301
302 if (svc->flags & IP_VS_SVC_F_HASHED) {
1e3e238e
HE		 303 pr_err("%s(): request for already hashed, called from %pF\n",
304 __func__, __builtin_return_address(0));
1da177e4
LT		 305 return 0;
306 }
307
308 if (svc->fwmark == 0) {
309 /*
fc723250 310 * Hash it by <netns,protocol,addr,port> in ip_vs_svc_table
1da177e4 311 */
fc723250
HS		 312 hash = ip_vs_svc_hashkey(svc->net, svc->af, svc->protocol,
313 &svc->addr, svc->port);
ceec4c38 314 hlist_add_head_rcu(&svc->s_list, &ip_vs_svc_table[hash]);
1da177e4
LT		 315 } else {
316 /*
fc723250 317 * Hash it by fwmark in svc_fwm_table
1da177e4 318 */
fc723250 319 hash = ip_vs_svc_fwm_hashkey(svc->net, svc->fwmark);
ceec4c38 320 hlist_add_head_rcu(&svc->f_list, &ip_vs_svc_fwm_table[hash]);
1da177e4
LT		 321 }
322
323 svc->flags |= IP_VS_SVC_F_HASHED;
324 /* increase its refcnt because it is referenced by the svc table */
325 atomic_inc(&svc->refcnt);
326 return 1;
327}
328
329
330/*
fc723250 331 * Unhashes a service from svc_table / svc_fwm_table.
1da177e4
LT		 332 * Should be called with locked tables.
333 */
334static int ip_vs_svc_unhash(struct ip_vs_service *svc)
335{
336 if (!(svc->flags & IP_VS_SVC_F_HASHED)) {
1e3e238e
HE		 337 pr_err("%s(): request for unhash flagged, called from %pF\n",
338 __func__, __builtin_return_address(0));
1da177e4
LT		 339 return 0;
340 }
341
342 if (svc->fwmark == 0) {
fc723250 343 /* Remove it from the svc_table table */
ceec4c38 344 hlist_del_rcu(&svc->s_list);
1da177e4 345 } else {
fc723250 346 /* Remove it from the svc_fwm_table table */
ceec4c38 347 hlist_del_rcu(&svc->f_list);
1da177e4
LT		 348 }
349
350 svc->flags &= ~IP_VS_SVC_F_HASHED;
351 atomic_dec(&svc->refcnt);
352 return 1;
353}
354
355
356/*
fc723250 357 * Get service by {netns, proto,addr,port} in the service table.
1da177e4 358 */
b18610de 359static inline struct ip_vs_service *
fc723250
HS		 360__ip_vs_service_find(struct net *net, int af, __u16 protocol,
361 const union nf_inet_addr *vaddr, __be16 vport)
1da177e4 362{
95c96174 363 unsigned int hash;
1da177e4
LT		 364 struct ip_vs_service *svc;
365
366 /* Check for "full" addressed entries */
fc723250 367 hash = ip_vs_svc_hashkey(net, af, protocol, vaddr, vport);
1da177e4 368
ceec4c38 369 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[hash], s_list) {
b18610de
JV		 370 if ((svc->af == af)
371 && ip_vs_addr_equal(af, &svc->addr, vaddr)
1da177e4 372 && (svc->port == vport)
fc723250
HS		 373 && (svc->protocol == protocol)
374 && net_eq(svc->net, net)) {
1da177e4 375 /* HIT */
1da177e4
LT		 376 return svc;
377 }
378 }
379
380 return NULL;
381}
382
383
384/*
385 * Get service by {fwmark} in the service table.
386 */
b18610de 387static inline struct ip_vs_service *
fc723250 388__ip_vs_svc_fwm_find(struct net *net, int af, __u32 fwmark)
1da177e4 389{
95c96174 390 unsigned int hash;
1da177e4
LT		 391 struct ip_vs_service *svc;
392
393 /* Check for fwmark addressed entries */
fc723250 394 hash = ip_vs_svc_fwm_hashkey(net, fwmark);
1da177e4 395
ceec4c38 396 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[hash], f_list) {
fc723250
HS		 397 if (svc->fwmark == fwmark && svc->af == af
398 && net_eq(svc->net, net)) {
1da177e4 399 /* HIT */
1da177e4
LT		 400 return svc;
401 }
402 }
403
404 return NULL;
405}
406
ceec4c38 407/* Find service, called under RCU lock */
1da177e4 408struct ip_vs_service *
ceec4c38
JA		 409ip_vs_service_find(struct net *net, int af, __u32 fwmark, __u16 protocol,
410 const union nf_inet_addr *vaddr, __be16 vport)
1da177e4
LT		 411{
412 struct ip_vs_service *svc;
763f8d0e 413 struct netns_ipvs *ipvs = net_ipvs(net);
3c2e0505 414
1da177e4
LT		 415 /*
416 * Check the table hashed by fwmark first
417 */
097fc76a
JA		 418 if (fwmark) {
419 svc = __ip_vs_svc_fwm_find(net, af, fwmark);
420 if (svc)
421 goto out;
422 }
1da177e4
LT		 423
424 /*
425 * Check the table hashed by <protocol,addr,port>
426 * for "full" addressed entries
427 */
fc723250 428 svc = __ip_vs_service_find(net, af, protocol, vaddr, vport);
1da177e4
LT		 429
430 if (svc == NULL
431 && protocol == IPPROTO_TCP
763f8d0e 432 && atomic_read(&ipvs->ftpsvc_counter)
1da177e4
LT		 433 && (vport == FTPDATA || ntohs(vport) >= PROT_SOCK)) {
434 /*
435 * Check if ftp service entry exists, the packet
436 * might belong to FTP data connections.
437 */
fc723250 438 svc = __ip_vs_service_find(net, af, protocol, vaddr, FTPPORT);
1da177e4
LT		 439 }
440
441 if (svc == NULL
763f8d0e 442 && atomic_read(&ipvs->nullsvc_counter)) {
1da177e4
LT		 443 /*
444 * Check if the catch-all port (port zero) exists
445 */
fc723250 446 svc = __ip_vs_service_find(net, af, protocol, vaddr, 0);
1da177e4
LT		 447 }
448
449 out:
3c2e0505
JV		 450 IP_VS_DBG_BUF(9, "lookup service: fwm %u %s %s:%u %s\n",
451 fwmark, ip_vs_proto_name(protocol),
452 IP_VS_DBG_ADDR(af, vaddr), ntohs(vport),
453 svc ? "hit" : "not hit");
1da177e4
LT		 454
455 return svc;
456}
457
458
459static inline void
460__ip_vs_bind_svc(struct ip_vs_dest *dest, struct ip_vs_service *svc)
461{
462 atomic_inc(&svc->refcnt);
bcbde4c0 463 rcu_assign_pointer(dest->svc, svc);
1da177e4
LT		 464}
465
ceec4c38
JA		 466static void ip_vs_service_free(struct ip_vs_service *svc)
467{
468 if (svc->stats.cpustats)
469 free_percpu(svc->stats.cpustats);
470 kfree(svc);
471}
472
bcbde4c0 473static void ip_vs_service_rcu_free(struct rcu_head *head)
1da177e4 474{
bcbde4c0
JA		 475 struct ip_vs_service *svc;
476
477 svc = container_of(head, struct ip_vs_service, rcu_head);
478 ip_vs_service_free(svc);
479}
1da177e4 480
bcbde4c0
JA		 481static void __ip_vs_svc_put(struct ip_vs_service *svc, bool do_delay)
482{
26c15cfd 483 if (atomic_dec_and_test(&svc->refcnt)) {
ceec4c38 484 IP_VS_DBG_BUF(3, "Removing service %u/%s:%u\n",
26c15cfd
JA		 485 svc->fwmark,
486 IP_VS_DBG_ADDR(svc->af, &svc->addr),
ceec4c38 487 ntohs(svc->port));
bcbde4c0
JA		 488 if (do_delay)
489 call_rcu(&svc->rcu_head, ip_vs_service_rcu_free);
490 else
491 ip_vs_service_free(svc);
26c15cfd 492 }
1da177e4
LT		 493}
494
495
496/*
497 * Returns hash value for real service
498 */
95c96174 499static inline unsigned int ip_vs_rs_hashkey(int af,
7937df15
JV		 500 const union nf_inet_addr *addr,
501 __be16 port)
1da177e4 502{
95c96174 503 register unsigned int porth = ntohs(port);
7937df15
JV		 504 __be32 addr_fold = addr->ip;
505
506#ifdef CONFIG_IP_VS_IPV6
507 if (af == AF_INET6)
508 addr_fold = addr->ip6[0]^addr->ip6[1]^
509 addr->ip6[2]^addr->ip6[3];
510#endif
1da177e4 511
7937df15 512 return (ntohl(addr_fold)^(porth>>IP_VS_RTAB_BITS)^porth)
1da177e4
LT		 513 & IP_VS_RTAB_MASK;
514}
515
276472ea
JA		 516/* Hash ip_vs_dest in rs_table by <proto,addr,port>. */
517static void ip_vs_rs_hash(struct netns_ipvs *ipvs, struct ip_vs_dest *dest)
1da177e4 518{
95c96174 519 unsigned int hash;
1da177e4 520
276472ea
JA		 521 if (dest->in_rs_table)
522 return;
1da177e4
LT		 523
524 /*
525 * Hash by proto,addr,port,
526 * which are the parameters of the real service.
527 */
7937df15
JV		 528 hash = ip_vs_rs_hashkey(dest->af, &dest->addr, dest->port);
529
276472ea
JA		 530 hlist_add_head_rcu(&dest->d_list, &ipvs->rs_table[hash]);
531 dest->in_rs_table = 1;
1da177e4
LT		 532}
533
276472ea
JA		 534/* Unhash ip_vs_dest from rs_table. */
535static void ip_vs_rs_unhash(struct ip_vs_dest *dest)
1da177e4
LT		 536{
537 /*
fc723250 538 * Remove it from the rs_table table.
1da177e4 539 */
276472ea
JA		 540 if (dest->in_rs_table) {
541 hlist_del_rcu(&dest->d_list);
542 dest->in_rs_table = 0;
1da177e4 543 }
1da177e4
LT		 544}
545
276472ea
JA		 546/* Check if real service by <proto,addr,port> is present */
547bool ip_vs_has_real_service(struct net *net, int af, __u16 protocol,
548 const union nf_inet_addr *daddr, __be16 dport)
1da177e4 549{
fc723250 550 struct netns_ipvs *ipvs = net_ipvs(net);
95c96174 551 unsigned int hash;
1da177e4
LT		 552 struct ip_vs_dest *dest;
553
276472ea 554 /* Check for "full" addressed entries */
7937df15 555 hash = ip_vs_rs_hashkey(af, daddr, dport);
1da177e4 556
276472ea
JA		 557 rcu_read_lock();
558 hlist_for_each_entry_rcu(dest, &ipvs->rs_table[hash], d_list) {
559 if (dest->port == dport &&
560 dest->af == af &&
561 ip_vs_addr_equal(af, &dest->addr, daddr) &&
562 (dest->protocol == protocol || dest->vfwmark)) {
1da177e4 563 /* HIT */
276472ea
JA		 564 rcu_read_unlock();
565 return true;
1da177e4
LT		 566 }
567 }
276472ea 568 rcu_read_unlock();
1da177e4 569
276472ea 570 return false;
1da177e4
LT		 571}
572
413c2d04
JA		 573/* Lookup destination by {addr,port} in the given service
574 * Called under RCU lock.
1da177e4
LT		 575 */
576static struct ip_vs_dest *
7937df15
JV		 577ip_vs_lookup_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
578 __be16 dport)
1da177e4
LT		 579{
580 struct ip_vs_dest *dest;
581
582 /*
583 * Find the destination for the given service
584 */
413c2d04 585 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
7937df15
JV		 586 if ((dest->af == svc->af)
587 && ip_vs_addr_equal(svc->af, &dest->addr, daddr)
588 && (dest->port == dport)) {
1da177e4
LT		 589 /* HIT */
590 return dest;
591 }
592 }
593
594 return NULL;
595}
596
1e356f9c
RB		 597/*
598 * Find destination by {daddr,dport,vaddr,protocol}
413c2d04 599 * Created to be used in ip_vs_process_message() in
1e356f9c
RB		 600 * the backup synchronization daemon. It finds the
601 * destination to be bound to the received connection
602 * on the backup.
413c2d04 603 * Called under RCU lock, no refcnt is returned.
1e356f9c 604 */
fc723250
HS		 605struct ip_vs_dest *ip_vs_find_dest(struct net *net, int af,
606 const union nf_inet_addr *daddr,
7937df15
JV		 607 __be16 dport,
608 const union nf_inet_addr *vaddr,
52793dbe
JA		 609 __be16 vport, __u16 protocol, __u32 fwmark,
610 __u32 flags)
1e356f9c
RB		 611{
612 struct ip_vs_dest *dest;
613 struct ip_vs_service *svc;
52793dbe 614 __be16 port = dport;
1e356f9c 615
ceec4c38 616 svc = ip_vs_service_find(net, af, fwmark, protocol, vaddr, vport);
1e356f9c
RB		 617 if (!svc)
618 return NULL;
52793dbe
JA		 619 if (fwmark && (flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ)
620 port = 0;
621 dest = ip_vs_lookup_dest(svc, daddr, port);
622 if (!dest)
623 dest = ip_vs_lookup_dest(svc, daddr, port ^ dport);
1e356f9c
RB		 624 return dest;
625}
1da177e4 626
026ace06
JA		 627void ip_vs_dest_dst_rcu_free(struct rcu_head *head)
628{
629 struct ip_vs_dest_dst *dest_dst = container_of(head,
630 struct ip_vs_dest_dst,
631 rcu_head);
632
633 dst_release(dest_dst->dst_cache);
634 kfree(dest_dst);
635}
636
637/* Release dest_dst and dst_cache for dest in user context */
d1deae4d
JA		 638static void __ip_vs_dst_cache_reset(struct ip_vs_dest *dest)
639{
026ace06 640 struct ip_vs_dest_dst *old;
d1deae4d 641
026ace06
JA		 642 old = rcu_dereference_protected(dest->dest_dst, 1);
643 if (old) {
644 RCU_INIT_POINTER(dest->dest_dst, NULL);
645 call_rcu(&old->rcu_head, ip_vs_dest_dst_rcu_free);
646 }
d1deae4d
JA		 647}
648
1da177e4
LT		 649/*
650 * Lookup dest by {svc,addr,port} in the destination trash.
651 * The destination trash is used to hold the destinations that are removed
652 * from the service table but are still referenced by some conn entries.
653 * The reason to add the destination trash is when the dest is temporary
654 * down (either by administrator or by monitor program), the dest can be
655 * picked back from the trash, the remaining connections to the dest can
656 * continue, and the counting information of the dest is also useful for
657 * scheduling.
658 */
659static struct ip_vs_dest *
7937df15
JV		 660ip_vs_trash_get_dest(struct ip_vs_service *svc, const union nf_inet_addr *daddr,
661 __be16 dport)
1da177e4 662{
578bc3ef 663 struct ip_vs_dest *dest;
f2431e6e 664 struct netns_ipvs *ipvs = net_ipvs(svc->net);
1da177e4
LT		 665
666 /*
667 * Find the destination in trash
668 */
578bc3ef
JA		 669 spin_lock_bh(&ipvs->dest_trash_lock);
670 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
7937df15
JV		 671 IP_VS_DBG_BUF(3, "Destination %u/%s:%u still in trash, "
672 "dest->refcnt=%d\n",
673 dest->vfwmark,
674 IP_VS_DBG_ADDR(svc->af, &dest->addr),
675 ntohs(dest->port),
676 atomic_read(&dest->refcnt));
677 if (dest->af == svc->af &&
678 ip_vs_addr_equal(svc->af, &dest->addr, daddr) &&
1da177e4
LT		 679 dest->port == dport &&
680 dest->vfwmark == svc->fwmark &&
681 dest->protocol == svc->protocol &&
682 (svc->fwmark ||
7937df15 683 (ip_vs_addr_equal(svc->af, &dest->vaddr, &svc->addr) &&
1da177e4
LT		 684 dest->vport == svc->port))) {
685 /* HIT */
578bc3ef
JA		 686 list_del(&dest->t_list);
687 ip_vs_dest_hold(dest);
688 goto out;
1da177e4
LT		 689 }
690 }
691
578bc3ef
JA		 692 dest = NULL;
693
694out:
695 spin_unlock_bh(&ipvs->dest_trash_lock);
696
697 return dest;
1da177e4
LT		 698}
699
578bc3ef
JA		 700static void ip_vs_dest_free(struct ip_vs_dest *dest)
701{
bcbde4c0
JA		 702 struct ip_vs_service *svc = rcu_dereference_protected(dest->svc, 1);
703
578bc3ef 704 __ip_vs_dst_cache_reset(dest);
bcbde4c0 705 __ip_vs_svc_put(svc, false);
578bc3ef 706 free_percpu(dest->stats.cpustats);
9e4e948a 707 ip_vs_dest_put_and_free(dest);
578bc3ef 708}
1da177e4
LT		 709
710/*
711 * Clean up all the destinations in the trash
712 * Called by the ip_vs_control_cleanup()
713 *
714 * When the ip_vs_control_clearup is activated by ipvs module exit,
715 * the service tables must have been flushed and all the connections
716 * are expired, and the refcnt of each destination in the trash must
578bc3ef 717 * be 0, so we simply release them here.
1da177e4 718 */
f2431e6e 719static void ip_vs_trash_cleanup(struct net *net)
1da177e4
LT		 720{
721 struct ip_vs_dest *dest, *nxt;
f2431e6e 722 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 723
578bc3ef
JA		 724 del_timer_sync(&ipvs->dest_trash_timer);
725 /* No need to use dest_trash_lock */
726 list_for_each_entry_safe(dest, nxt, &ipvs->dest_trash, t_list) {
727 list_del(&dest->t_list);
728 ip_vs_dest_free(dest);
1da177e4
LT		 729 }
730}
731
55a3d4e1
JA		 732static void
733ip_vs_copy_stats(struct ip_vs_stats_user *dst, struct ip_vs_stats *src)
734{
735#define IP_VS_SHOW_STATS_COUNTER(c) dst->c = src->ustats.c - src->ustats0.c
55a3d4e1
JA		 736
737 spin_lock_bh(&src->lock);
738
739 IP_VS_SHOW_STATS_COUNTER(conns);
740 IP_VS_SHOW_STATS_COUNTER(inpkts);
741 IP_VS_SHOW_STATS_COUNTER(outpkts);
742 IP_VS_SHOW_STATS_COUNTER(inbytes);
743 IP_VS_SHOW_STATS_COUNTER(outbytes);
744
ea9f22cc 745 ip_vs_read_estimator(dst, src);
55a3d4e1
JA		 746
747 spin_unlock_bh(&src->lock);
748}
1da177e4
LT		 749
750static void
751ip_vs_zero_stats(struct ip_vs_stats *stats)
752{
753 spin_lock_bh(&stats->lock);
e93615d0 754
55a3d4e1
JA		 755 /* get current counters as zero point, rates are zeroed */
756
757#define IP_VS_ZERO_STATS_COUNTER(c) stats->ustats0.c = stats->ustats.c
55a3d4e1
JA		 758
759 IP_VS_ZERO_STATS_COUNTER(conns);
760 IP_VS_ZERO_STATS_COUNTER(inpkts);
761 IP_VS_ZERO_STATS_COUNTER(outpkts);
762 IP_VS_ZERO_STATS_COUNTER(inbytes);
763 IP_VS_ZERO_STATS_COUNTER(outbytes);
764
1da177e4 765 ip_vs_zero_estimator(stats);
e93615d0 766
3a14a313 767 spin_unlock_bh(&stats->lock);
1da177e4
LT		 768}
769
770/*
771 * Update a destination in the given service
772 */
773static void
26c15cfd
JA		 774__ip_vs_update_dest(struct ip_vs_service *svc, struct ip_vs_dest *dest,
775 struct ip_vs_dest_user_kern *udest, int add)
1da177e4 776{
fc723250 777 struct netns_ipvs *ipvs = net_ipvs(svc->net);
bcbde4c0 778 struct ip_vs_service *old_svc;
ceec4c38 779 struct ip_vs_scheduler *sched;
1da177e4
LT		 780 int conn_flags;
781
782 /* set the weight and the flags */
783 atomic_set(&dest->weight, udest->weight);
3575792e
JA		 784 conn_flags = udest->conn_flags & IP_VS_CONN_F_DEST_MASK;
785 conn_flags |= IP_VS_CONN_F_INACTIVE;
1da177e4 786
1da177e4 787 /* set the IP_VS_CONN_F_NOOUTPUT flag if not masquerading/NAT */
3575792e 788 if ((conn_flags & IP_VS_CONN_F_FWD_MASK) != IP_VS_CONN_F_MASQ) {
1da177e4
LT		 789 conn_flags |= IP_VS_CONN_F_NOOUTPUT;
790 } else {
791 /*
fc723250 792 * Put the real service in rs_table if not present.
1da177e4
LT		 793 * For now only for NAT!
794 */
fc723250 795 ip_vs_rs_hash(ipvs, dest);
1da177e4
LT		 796 }
797 atomic_set(&dest->conn_flags, conn_flags);
798
799 /* bind the service */
bcbde4c0
JA		 800 old_svc = rcu_dereference_protected(dest->svc, 1);
801 if (!old_svc) {
1da177e4
LT		 802 __ip_vs_bind_svc(dest, svc);
803 } else {
bcbde4c0 804 if (old_svc != svc) {
1da177e4
LT		 805 ip_vs_zero_stats(&dest->stats);
806 __ip_vs_bind_svc(dest, svc);
bcbde4c0 807 __ip_vs_svc_put(old_svc, true);
1da177e4
LT		 808 }
809 }
810
811 /* set the dest status flags */
812 dest->flags |= IP_VS_DEST_F_AVAILABLE;
813
814 if (udest->u_threshold == 0 || udest->u_threshold > dest->u_threshold)
815 dest->flags &= ~IP_VS_DEST_F_OVERLOAD;
816 dest->u_threshold = udest->u_threshold;
817 dest->l_threshold = udest->l_threshold;
26c15cfd 818
ff75f40f 819 spin_lock_bh(&dest->dst_lock);
d1deae4d 820 __ip_vs_dst_cache_reset(dest);
ff75f40f 821 spin_unlock_bh(&dest->dst_lock);
fc604767 822
ceec4c38 823 sched = rcu_dereference_protected(svc->scheduler, 1);
26c15cfd 824 if (add) {
ceec4c38 825 ip_vs_start_estimator(svc->net, &dest->stats);
413c2d04 826 list_add_rcu(&dest->n_list, &svc->destinations);
26c15cfd 827 svc->num_dests++;
ceec4c38
JA		 828 if (sched->add_dest)
829 sched->add_dest(svc, dest);
6b6df466 830 } else {
ceec4c38
JA		 831 if (sched->upd_dest)
832 sched->upd_dest(svc, dest);
26c15cfd 833 }
1da177e4
LT		 834}
835
836
837/*
838 * Create a destination for the given service
839 */
840static int
c860c6b1 841ip_vs_new_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest,
1da177e4
LT		 842 struct ip_vs_dest **dest_p)
843{
844 struct ip_vs_dest *dest;
827da44c 845 unsigned int atype, i;
1da177e4
LT		 846
847 EnterFunction(2);
848
09571c7a
VB		 849#ifdef CONFIG_IP_VS_IPV6
850 if (svc->af == AF_INET6) {
851 atype = ipv6_addr_type(&udest->addr.in6);
3bfb92f4
SW		 852 if ((!(atype & IPV6_ADDR_UNICAST) ||
853 atype & IPV6_ADDR_LINKLOCAL) &&
4a98480b 854 !__ip_vs_addr_is_local_v6(svc->net, &udest->addr.in6))
09571c7a
VB		 855 return -EINVAL;
856 } else
857#endif
858 {
4a98480b 859 atype = inet_addr_type(svc->net, udest->addr.ip);
09571c7a
VB		 860 if (atype != RTN_LOCAL && atype != RTN_UNICAST)
861 return -EINVAL;
862 }
1da177e4 863
dee06e47 864 dest = kzalloc(sizeof(struct ip_vs_dest), GFP_KERNEL);
0a9ee813 865 if (dest == NULL)
1da177e4 866 return -ENOMEM;
0a9ee813 867
b17fc996 868 dest->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 869 if (!dest->stats.cpustats)
b17fc996 870 goto err_alloc;
1da177e4 871
827da44c
JS		 872 for_each_possible_cpu(i) {
873 struct ip_vs_cpu_stats *ip_vs_dest_stats;
874 ip_vs_dest_stats = per_cpu_ptr(dest->stats.cpustats, i);
875 u64_stats_init(&ip_vs_dest_stats->syncp);
876 }
877
c860c6b1 878 dest->af = svc->af;
1da177e4 879 dest->protocol = svc->protocol;
c860c6b1 880 dest->vaddr = svc->addr;
1da177e4
LT		 881 dest->vport = svc->port;
882 dest->vfwmark = svc->fwmark;
c860c6b1 883 ip_vs_addr_copy(svc->af, &dest->addr, &udest->addr);
1da177e4
LT		 884 dest->port = udest->port;
885
886 atomic_set(&dest->activeconns, 0);
887 atomic_set(&dest->inactconns, 0);
888 atomic_set(&dest->persistconns, 0);
26c15cfd 889 atomic_set(&dest->refcnt, 1);
1da177e4 890
276472ea 891 INIT_HLIST_NODE(&dest->d_list);
1da177e4
LT		 892 spin_lock_init(&dest->dst_lock);
893 spin_lock_init(&dest->stats.lock);
26c15cfd 894 __ip_vs_update_dest(svc, dest, udest, 1);
1da177e4
LT		 895
896 *dest_p = dest;
897
898 LeaveFunction(2);
899 return 0;
b17fc996
HS		 900
901err_alloc:
902 kfree(dest);
903 return -ENOMEM;
1da177e4
LT		 904}
905
906
907/*
908 * Add a destination into an existing service
909 */
910static int
c860c6b1 911ip_vs_add_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 912{
913 struct ip_vs_dest *dest;
c860c6b1 914 union nf_inet_addr daddr;
014d730d 915 __be16 dport = udest->port;
1da177e4
LT		 916 int ret;
917
918 EnterFunction(2);
919
920 if (udest->weight < 0) {
1e3e238e 921 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 922 return -ERANGE;
923 }
924
925 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 926 pr_err("%s(): lower threshold is higher than upper threshold\n",
927 __func__);
1da177e4
LT		 928 return -ERANGE;
929 }
930
c860c6b1
JV		 931 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
932
413c2d04
JA		 933 /* We use function that requires RCU lock */
934 rcu_read_lock();
7937df15 935 dest = ip_vs_lookup_dest(svc, &daddr, dport);
413c2d04 936 rcu_read_unlock();
7937df15 937
1da177e4 938 if (dest != NULL) {
1e3e238e 939 IP_VS_DBG(1, "%s(): dest already exists\n", __func__);
1da177e4
LT		 940 return -EEXIST;
941 }
942
943 /*
944 * Check if the dest already exists in the trash and
945 * is from the same service
946 */
7937df15
JV		 947 dest = ip_vs_trash_get_dest(svc, &daddr, dport);
948
1da177e4 949 if (dest != NULL) {
cfc78c5a
JV		 950 IP_VS_DBG_BUF(3, "Get destination %s:%u from trash, "
951 "dest->refcnt=%d, service %u/%s:%u\n",
952 IP_VS_DBG_ADDR(svc->af, &daddr), ntohs(dport),
953 atomic_read(&dest->refcnt),
954 dest->vfwmark,
955 IP_VS_DBG_ADDR(svc->af, &dest->vaddr),
956 ntohs(dest->vport));
957
26c15cfd
JA		 958 __ip_vs_update_dest(svc, dest, udest, 1);
959 ret = 0;
960 } else {
1da177e4 961 /*
26c15cfd 962 * Allocate and initialize the dest structure
1da177e4 963 */
26c15cfd 964 ret = ip_vs_new_dest(svc, udest, &dest);
1da177e4 965 }
1da177e4
LT		 966 LeaveFunction(2);
967
26c15cfd 968 return ret;
1da177e4
LT		 969}
970
971
972/*
973 * Edit a destination in the given service
974 */
975static int
c860c6b1 976ip_vs_edit_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 977{
978 struct ip_vs_dest *dest;
c860c6b1 979 union nf_inet_addr daddr;
014d730d 980 __be16 dport = udest->port;
1da177e4
LT		 981
982 EnterFunction(2);
983
984 if (udest->weight < 0) {
1e3e238e 985 pr_err("%s(): server weight less than zero\n", __func__);
1da177e4
LT		 986 return -ERANGE;
987 }
988
989 if (udest->l_threshold > udest->u_threshold) {
1e3e238e
HE		 990 pr_err("%s(): lower threshold is higher than upper threshold\n",
991 __func__);
1da177e4
LT		 992 return -ERANGE;
993 }
994
c860c6b1
JV		 995 ip_vs_addr_copy(svc->af, &daddr, &udest->addr);
996
413c2d04
JA		 997 /* We use function that requires RCU lock */
998 rcu_read_lock();
7937df15 999 dest = ip_vs_lookup_dest(svc, &daddr, dport);
413c2d04 1000 rcu_read_unlock();
7937df15 1001
1da177e4 1002 if (dest == NULL) {
1e3e238e 1003 IP_VS_DBG(1, "%s(): dest doesn't exist\n", __func__);
1da177e4
LT		 1004 return -ENOENT;
1005 }
1006
26c15cfd 1007 __ip_vs_update_dest(svc, dest, udest, 0);
1da177e4
LT		 1008 LeaveFunction(2);
1009
1010 return 0;
1011}
1012
1da177e4
LT		 1013/*
1014 * Delete a destination (must be already unlinked from the service)
1015 */
578bc3ef
JA		 1016static void __ip_vs_del_dest(struct net *net, struct ip_vs_dest *dest,
1017 bool cleanup)
1da177e4 1018{
a0840e2e
HS		 1019 struct netns_ipvs *ipvs = net_ipvs(net);
1020
6ef757f9 1021 ip_vs_stop_estimator(net, &dest->stats);
1da177e4
LT		 1022
1023 /*
1024 * Remove it from the d-linked list with the real services.
1025 */
1da177e4 1026 ip_vs_rs_unhash(dest);
1da177e4 1027
578bc3ef
JA		 1028 spin_lock_bh(&ipvs->dest_trash_lock);
1029 IP_VS_DBG_BUF(3, "Moving dest %s:%u into trash, dest->refcnt=%d\n",
1030 IP_VS_DBG_ADDR(dest->af, &dest->addr), ntohs(dest->port),
1031 atomic_read(&dest->refcnt));
1032 if (list_empty(&ipvs->dest_trash) && !cleanup)
1033 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1034 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1035 /* dest lives in trash without reference */
1036 list_add(&dest->t_list, &ipvs->dest_trash);
bcbde4c0 1037 dest->idle_start = 0;
578bc3ef
JA		 1038 spin_unlock_bh(&ipvs->dest_trash_lock);
1039 ip_vs_dest_put(dest);
1da177e4
LT		 1040}
1041
1042
1043/*
1044 * Unlink a destination from the given service
1045 */
1046static void __ip_vs_unlink_dest(struct ip_vs_service *svc,
1047 struct ip_vs_dest *dest,
1048 int svcupd)
1049{
1050 dest->flags &= ~IP_VS_DEST_F_AVAILABLE;
1051
1052 /*
1053 * Remove it from the d-linked destination list.
1054 */
413c2d04 1055 list_del_rcu(&dest->n_list);
1da177e4 1056 svc->num_dests--;
82dfb6f3 1057
ceec4c38
JA		 1058 if (svcupd) {
1059 struct ip_vs_scheduler *sched;
6b6df466 1060
ceec4c38
JA		 1061 sched = rcu_dereference_protected(svc->scheduler, 1);
1062 if (sched->del_dest)
1063 sched->del_dest(svc, dest);
1064 }
1da177e4
LT		 1065}
1066
1067
1068/*
1069 * Delete a destination server in the given service
1070 */
1071static int
c860c6b1 1072ip_vs_del_dest(struct ip_vs_service *svc, struct ip_vs_dest_user_kern *udest)
1da177e4
LT		 1073{
1074 struct ip_vs_dest *dest;
014d730d 1075 __be16 dport = udest->port;
1da177e4
LT		 1076
1077 EnterFunction(2);
1078
413c2d04
JA		 1079 /* We use function that requires RCU lock */
1080 rcu_read_lock();
7937df15 1081 dest = ip_vs_lookup_dest(svc, &udest->addr, dport);
413c2d04 1082 rcu_read_unlock();
c860c6b1 1083
1da177e4 1084 if (dest == NULL) {
1e3e238e 1085 IP_VS_DBG(1, "%s(): destination not found!\n", __func__);
1da177e4
LT		 1086 return -ENOENT;
1087 }
1088
1da177e4
LT		 1089 /*
1090 * Unlink dest from the service
1091 */
1092 __ip_vs_unlink_dest(svc, dest, 1);
1093
1da177e4
LT		 1094 /*
1095 * Delete the destination
1096 */
578bc3ef 1097 __ip_vs_del_dest(svc->net, dest, false);
1da177e4
LT		 1098
1099 LeaveFunction(2);
1100
1101 return 0;
1102}
1103
578bc3ef
JA		 1104static void ip_vs_dest_trash_expire(unsigned long data)
1105{
1106 struct net *net = (struct net *) data;
1107 struct netns_ipvs *ipvs = net_ipvs(net);
1108 struct ip_vs_dest *dest, *next;
bcbde4c0 1109 unsigned long now = jiffies;
578bc3ef
JA		 1110
1111 spin_lock(&ipvs->dest_trash_lock);
1112 list_for_each_entry_safe(dest, next, &ipvs->dest_trash, t_list) {
578bc3ef
JA		 1113 if (atomic_read(&dest->refcnt) > 0)
1114 continue;
bcbde4c0
JA		 1115 if (dest->idle_start) {
1116 if (time_before(now, dest->idle_start +
1117 IP_VS_DEST_TRASH_PERIOD))
1118 continue;
1119 } else {
1120 dest->idle_start = max(1UL, now);
1121 continue;
1122 }
578bc3ef
JA		 1123 IP_VS_DBG_BUF(3, "Removing destination %u/%s:%u from trash\n",
1124 dest->vfwmark,
bcbde4c0 1125 IP_VS_DBG_ADDR(dest->af, &dest->addr),
578bc3ef
JA		 1126 ntohs(dest->port));
1127 list_del(&dest->t_list);
1128 ip_vs_dest_free(dest);
1129 }
1130 if (!list_empty(&ipvs->dest_trash))
1131 mod_timer(&ipvs->dest_trash_timer,
bcbde4c0 1132 jiffies + (IP_VS_DEST_TRASH_PERIOD >> 1));
578bc3ef
JA		 1133 spin_unlock(&ipvs->dest_trash_lock);
1134}
1da177e4
LT		 1135
1136/*
1137 * Add a service into the service hash table
1138 */
1139static int
fc723250 1140ip_vs_add_service(struct net *net, struct ip_vs_service_user_kern *u,
c860c6b1 1141 struct ip_vs_service **svc_p)
1da177e4 1142{
827da44c 1143 int ret = 0, i;
1da177e4 1144 struct ip_vs_scheduler *sched = NULL;
0d1e71b0 1145 struct ip_vs_pe *pe = NULL;
1da177e4 1146 struct ip_vs_service *svc = NULL;
a0840e2e 1147 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4
LT		 1148
1149 /* increase the module use count */
1150 ip_vs_use_count_inc();
1151
1152 /* Lookup the scheduler by 'u->sched_name' */
1153 sched = ip_vs_scheduler_get(u->sched_name);
1154 if (sched == NULL) {
1e3e238e 1155 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1da177e4 1156 ret = -ENOENT;
6e08bfb8 1157 goto out_err;
1da177e4
LT		 1158 }
1159
0d1e71b0 1160 if (u->pe_name && *u->pe_name) {
e9e5eee8 1161 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1162 if (pe == NULL) {
1163 pr_info("persistence engine module ip_vs_pe_%s "
1164 "not found\n", u->pe_name);
1165 ret = -ENOENT;
1166 goto out_err;
1167 }
1168 }
1169
f94fd041 1170#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1171 if (u->af == AF_INET6) {
1172 __u32 plen = (__force __u32) u->netmask;
1173
1174 if (plen < 1 || plen > 128) {
1175 ret = -EINVAL;
1176 goto out_err;
1177 }
f94fd041
JV		 1178 }
1179#endif
1180
dee06e47 1181 svc = kzalloc(sizeof(struct ip_vs_service), GFP_KERNEL);
1da177e4 1182 if (svc == NULL) {
1e3e238e 1183 IP_VS_DBG(1, "%s(): no memory\n", __func__);
1da177e4
LT		 1184 ret = -ENOMEM;
1185 goto out_err;
1186 }
b17fc996 1187 svc->stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a54e939
JL		 1188 if (!svc->stats.cpustats) {
1189 ret = -ENOMEM;
b17fc996 1190 goto out_err;
0a54e939 1191 }
1da177e4 1192
827da44c
JS		 1193 for_each_possible_cpu(i) {
1194 struct ip_vs_cpu_stats *ip_vs_stats;
1195 ip_vs_stats = per_cpu_ptr(svc->stats.cpustats, i);
1196 u64_stats_init(&ip_vs_stats->syncp);
1197 }
1198
1199
1da177e4 1200 /* I'm the first user of the service */
1da177e4
LT		 1201 atomic_set(&svc->refcnt, 0);
1202
c860c6b1 1203 svc->af = u->af;
1da177e4 1204 svc->protocol = u->protocol;
c860c6b1 1205 ip_vs_addr_copy(svc->af, &svc->addr, &u->addr);
1da177e4
LT		 1206 svc->port = u->port;
1207 svc->fwmark = u->fwmark;
1208 svc->flags = u->flags;
1209 svc->timeout = u->timeout * HZ;
1210 svc->netmask = u->netmask;
fc723250 1211 svc->net = net;
1da177e4
LT		 1212
1213 INIT_LIST_HEAD(&svc->destinations);
ba3a3ce1 1214 spin_lock_init(&svc->sched_lock);
1da177e4
LT		 1215 spin_lock_init(&svc->stats.lock);
1216
1217 /* Bind the scheduler */
1218 ret = ip_vs_bind_scheduler(svc, sched);
1219 if (ret)
1220 goto out_err;
1221 sched = NULL;
1222
0d1e71b0 1223 /* Bind the ct retriever */
ceec4c38 1224 RCU_INIT_POINTER(svc->pe, pe);
0d1e71b0
SH		 1225 pe = NULL;
1226
1da177e4
LT		 1227 /* Update the virtual service counters */
1228 if (svc->port == FTPPORT)
763f8d0e 1229 atomic_inc(&ipvs->ftpsvc_counter);
1da177e4 1230 else if (svc->port == 0)
763f8d0e 1231 atomic_inc(&ipvs->nullsvc_counter);
1da177e4 1232
6ef757f9 1233 ip_vs_start_estimator(net, &svc->stats);
f94fd041
JV		 1234
1235 /* Count only IPv4 services for old get/setsockopt interface */
1236 if (svc->af == AF_INET)
a0840e2e 1237 ipvs->num_services++;
1da177e4
LT		 1238
1239 /* Hash the service into the service table */
1da177e4 1240 ip_vs_svc_hash(svc);
1da177e4
LT		 1241
1242 *svc_p = svc;
7a4f0761
HS		 1243 /* Now there is a service - full throttle */
1244 ipvs->enable = 1;
1da177e4
LT		 1245 return 0;
1246
b17fc996 1247
6e08bfb8 1248 out_err:
1da177e4 1249 if (svc != NULL) {
ceec4c38
JA		 1250 ip_vs_unbind_scheduler(svc, sched);
1251 ip_vs_service_free(svc);
1da177e4
LT		 1252 }
1253 ip_vs_scheduler_put(sched);
0d1e71b0 1254 ip_vs_pe_put(pe);
1da177e4 1255
1da177e4
LT		 1256 /* decrease the module use count */
1257 ip_vs_use_count_dec();
1258
1259 return ret;
1260}
1261
1262
1263/*
1264 * Edit a service and bind it with a new scheduler
1265 */
1266static int
c860c6b1 1267ip_vs_edit_service(struct ip_vs_service *svc, struct ip_vs_service_user_kern *u)
1da177e4
LT		 1268{
1269 struct ip_vs_scheduler *sched, *old_sched;
0d1e71b0 1270 struct ip_vs_pe *pe = NULL, *old_pe = NULL;
1da177e4
LT		 1271 int ret = 0;
1272
1273 /*
1274 * Lookup the scheduler, by 'u->sched_name'
1275 */
1276 sched = ip_vs_scheduler_get(u->sched_name);
1277 if (sched == NULL) {
1e3e238e 1278 pr_info("Scheduler module ip_vs_%s not found\n", u->sched_name);
1da177e4
LT		 1279 return -ENOENT;
1280 }
1281 old_sched = sched;
1282
0d1e71b0 1283 if (u->pe_name && *u->pe_name) {
e9e5eee8 1284 pe = ip_vs_pe_getbyname(u->pe_name);
0d1e71b0
SH		 1285 if (pe == NULL) {
1286 pr_info("persistence engine module ip_vs_pe_%s "
1287 "not found\n", u->pe_name);
1288 ret = -ENOENT;
1289 goto out;
1290 }
1291 old_pe = pe;
1292 }
1293
f94fd041 1294#ifdef CONFIG_IP_VS_IPV6
0a925864
JA		 1295 if (u->af == AF_INET6) {
1296 __u32 plen = (__force __u32) u->netmask;
1297
1298 if (plen < 1 || plen > 128) {
1299 ret = -EINVAL;
1300 goto out;
1301 }
f94fd041
JV		 1302 }
1303#endif
1304
ceec4c38
JA		 1305 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1306 if (sched != old_sched) {
1307 /* Bind the new scheduler */
1308 ret = ip_vs_bind_scheduler(svc, sched);
1309 if (ret) {
1310 old_sched = sched;
1311 goto out;
1312 }
1313 /* Unbind the old scheduler on success */
1314 ip_vs_unbind_scheduler(svc, old_sched);
1315 }
1da177e4
LT		 1316
1317 /*
1318 * Set the flags and timeout value
1319 */
1320 svc->flags = u->flags | IP_VS_SVC_F_HASHED;
1321 svc->timeout = u->timeout * HZ;
1322 svc->netmask = u->netmask;
1323
ceec4c38
JA		 1324 old_pe = rcu_dereference_protected(svc->pe, 1);
1325 if (pe != old_pe)
1326 rcu_assign_pointer(svc->pe, pe);
1da177e4 1327
552ad65a 1328out:
6e08bfb8 1329 ip_vs_scheduler_put(old_sched);
0d1e71b0 1330 ip_vs_pe_put(old_pe);
1da177e4
LT		 1331 return ret;
1332}
1333
1da177e4
LT		 1334/*
1335 * Delete a service from the service list
1336 * - The service must be unlinked, unlocked and not referenced!
1337 * - We are called under _bh lock
1338 */
578bc3ef 1339static void __ip_vs_del_service(struct ip_vs_service *svc, bool cleanup)
1da177e4
LT		 1340{
1341 struct ip_vs_dest *dest, *nxt;
1342 struct ip_vs_scheduler *old_sched;
0d1e71b0 1343 struct ip_vs_pe *old_pe;
a0840e2e 1344 struct netns_ipvs *ipvs = net_ipvs(svc->net);
0d1e71b0
SH		 1345
1346 pr_info("%s: enter\n", __func__);
1da177e4 1347
f94fd041
JV		 1348 /* Count only IPv4 services for old get/setsockopt interface */
1349 if (svc->af == AF_INET)
a0840e2e 1350 ipvs->num_services--;
f94fd041 1351
6ef757f9 1352 ip_vs_stop_estimator(svc->net, &svc->stats);
1da177e4
LT		 1353
1354 /* Unbind scheduler */
ceec4c38
JA		 1355 old_sched = rcu_dereference_protected(svc->scheduler, 1);
1356 ip_vs_unbind_scheduler(svc, old_sched);
6e08bfb8 1357 ip_vs_scheduler_put(old_sched);
1da177e4 1358
ceec4c38
JA		 1359 /* Unbind persistence engine, keep svc->pe */
1360 old_pe = rcu_dereference_protected(svc->pe, 1);
0d1e71b0
SH		 1361 ip_vs_pe_put(old_pe);
1362
1da177e4
LT		 1363 /*
1364 * Unlink the whole destination list
1365 */
1366 list_for_each_entry_safe(dest, nxt, &svc->destinations, n_list) {
1367 __ip_vs_unlink_dest(svc, dest, 0);
578bc3ef 1368 __ip_vs_del_dest(svc->net, dest, cleanup);
1da177e4
LT		 1369 }
1370
1371 /*
1372 * Update the virtual service counters
1373 */
1374 if (svc->port == FTPPORT)
763f8d0e 1375 atomic_dec(&ipvs->ftpsvc_counter);
1da177e4 1376 else if (svc->port == 0)
763f8d0e 1377 atomic_dec(&ipvs->nullsvc_counter);
1da177e4
LT		 1378
1379 /*
1380 * Free the service if nobody refers to it
1381 */
bcbde4c0 1382 __ip_vs_svc_put(svc, true);
1da177e4
LT		 1383
1384 /* decrease the module use count */
1385 ip_vs_use_count_dec();
1386}
1387
1388/*
26c15cfd 1389 * Unlink a service from list and try to delete it if its refcnt reached 0
1da177e4 1390 */
578bc3ef 1391static void ip_vs_unlink_service(struct ip_vs_service *svc, bool cleanup)
1da177e4 1392{
ceec4c38
JA		 1393 /* Hold svc to avoid double release from dest_trash */
1394 atomic_inc(&svc->refcnt);
1da177e4
LT		 1395 /*
1396 * Unhash it from the service table
1397 */
1da177e4
LT		 1398 ip_vs_svc_unhash(svc);
1399
578bc3ef 1400 __ip_vs_del_service(svc, cleanup);
26c15cfd
JA		 1401}
1402
1403/*
1404 * Delete a service from the service list
1405 */
1406static int ip_vs_del_service(struct ip_vs_service *svc)
1407{
1408 if (svc == NULL)
1409 return -EEXIST;
578bc3ef 1410 ip_vs_unlink_service(svc, false);
1da177e4
LT		 1411
1412 return 0;
1413}
1414
1415
1416/*
1417 * Flush all the virtual services
1418 */
578bc3ef 1419static int ip_vs_flush(struct net *net, bool cleanup)
1da177e4
LT		 1420{
1421 int idx;
ceec4c38
JA		 1422 struct ip_vs_service *svc;
1423 struct hlist_node *n;
1da177e4
LT		 1424
1425 /*
fc723250 1426 * Flush the service table hashed by <netns,protocol,addr,port>
1da177e4
LT		 1427 */
1428 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1429 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_table[idx],
1430 s_list) {
fc723250 1431 if (net_eq(svc->net, net))
578bc3ef 1432 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1433 }
1434 }
1435
1436 /*
1437 * Flush the service table hashed by fwmark
1438 */
1439 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1440 hlist_for_each_entry_safe(svc, n, &ip_vs_svc_fwm_table[idx],
1441 f_list) {
fc723250 1442 if (net_eq(svc->net, net))
578bc3ef 1443 ip_vs_unlink_service(svc, cleanup);
1da177e4
LT		 1444 }
1445 }
1446
1447 return 0;
1448}
1449
7a4f0761
HS		 1450/*
1451 * Delete service by {netns} in the service table.
1452 * Called by __ip_vs_cleanup()
1453 */
503cf15a 1454void ip_vs_service_net_cleanup(struct net *net)
7a4f0761
HS		 1455{
1456 EnterFunction(2);
1457 /* Check for "full" addressed entries */
1458 mutex_lock(&__ip_vs_mutex);
578bc3ef 1459 ip_vs_flush(net, true);
7a4f0761
HS		 1460 mutex_unlock(&__ip_vs_mutex);
1461 LeaveFunction(2);
1462}
d1deae4d
JA		 1463
1464/* Put all references for device (dst_cache) */
7a4f0761 1465static inline void
d1deae4d 1466ip_vs_forget_dev(struct ip_vs_dest *dest, struct net_device *dev)
7a4f0761 1467{
d717bb2a
JA		 1468 struct ip_vs_dest_dst *dest_dst;
1469
7a4f0761 1470 spin_lock_bh(&dest->dst_lock);
d717bb2a
JA		 1471 dest_dst = rcu_dereference_protected(dest->dest_dst, 1);
1472 if (dest_dst && dest_dst->dst_cache->dev == dev) {
7a4f0761
HS		 1473 IP_VS_DBG_BUF(3, "Reset dev:%s dest %s:%u ,dest->refcnt=%d\n",
1474 dev->name,
1475 IP_VS_DBG_ADDR(dest->af, &dest->addr),
1476 ntohs(dest->port),
1477 atomic_read(&dest->refcnt));
d1deae4d 1478 __ip_vs_dst_cache_reset(dest);
7a4f0761
HS		 1479 }
1480 spin_unlock_bh(&dest->dst_lock);
1481
1482}
313eae63
JA		 1483/* Netdev event receiver
1484 * Currently only NETDEV_DOWN is handled to release refs to cached dsts
7a4f0761
HS		 1485 */
1486static int ip_vs_dst_event(struct notifier_block *this, unsigned long event,
351638e7 1487 void *ptr)
7a4f0761 1488{
351638e7 1489 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
7a4f0761 1490 struct net *net = dev_net(dev);
283283c4 1491 struct netns_ipvs *ipvs = net_ipvs(net);
7a4f0761
HS		 1492 struct ip_vs_service *svc;
1493 struct ip_vs_dest *dest;
1494 unsigned int idx;
1495
313eae63 1496 if (event != NETDEV_DOWN || !ipvs)
7a4f0761
HS		 1497 return NOTIFY_DONE;
1498 IP_VS_DBG(3, "%s() dev=%s\n", __func__, dev->name);
1499 EnterFunction(2);
1500 mutex_lock(&__ip_vs_mutex);
1501 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1502 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
7a4f0761
HS		 1503 if (net_eq(svc->net, net)) {
1504 list_for_each_entry(dest, &svc->destinations,
1505 n_list) {
d1deae4d 1506 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1507 }
1508 }
1509 }
1510
ceec4c38 1511 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
7a4f0761
HS		 1512 if (net_eq(svc->net, net)) {
1513 list_for_each_entry(dest, &svc->destinations,
1514 n_list) {
d1deae4d 1515 ip_vs_forget_dev(dest, dev);
7a4f0761
HS		 1516 }
1517 }
1518
1519 }
1520 }
1521
578bc3ef
JA		 1522 spin_lock_bh(&ipvs->dest_trash_lock);
1523 list_for_each_entry(dest, &ipvs->dest_trash, t_list) {
d1deae4d 1524 ip_vs_forget_dev(dest, dev);
7a4f0761 1525 }
578bc3ef 1526 spin_unlock_bh(&ipvs->dest_trash_lock);
7a4f0761
HS		 1527 mutex_unlock(&__ip_vs_mutex);
1528 LeaveFunction(2);
1529 return NOTIFY_DONE;
1530}
1da177e4
LT		 1531
1532/*
1533 * Zero counters in a service or all services
1534 */
1535static int ip_vs_zero_service(struct ip_vs_service *svc)
1536{
1537 struct ip_vs_dest *dest;
1538
1da177e4
LT		 1539 list_for_each_entry(dest, &svc->destinations, n_list) {
1540 ip_vs_zero_stats(&dest->stats);
1541 }
1542 ip_vs_zero_stats(&svc->stats);
1da177e4
LT		 1543 return 0;
1544}
1545
fc723250 1546static int ip_vs_zero_all(struct net *net)
1da177e4
LT		 1547{
1548 int idx;
1549 struct ip_vs_service *svc;
1550
1551 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1552 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
fc723250
HS		 1553 if (net_eq(svc->net, net))
1554 ip_vs_zero_service(svc);
1da177e4
LT		 1555 }
1556 }
1557
1558 for(idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1559 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
fc723250
HS		 1560 if (net_eq(svc->net, net))
1561 ip_vs_zero_service(svc);
1da177e4
LT		 1562 }
1563 }
1564
2a0751af 1565 ip_vs_zero_stats(&net_ipvs(net)->tot_stats);
1da177e4
LT		 1566 return 0;
1567}
1568
14e40546 1569#ifdef CONFIG_SYSCTL
749c42b6
JA		 1570
1571static int zero;
1572static int three = 3;
1573
1da177e4 1574static int
fe2c6338 1575proc_do_defense_mode(struct ctl_table *table, int write,
1da177e4
LT		 1576 void __user *buffer, size_t *lenp, loff_t *ppos)
1577{
9330419d 1578 struct net *net = current->nsproxy->net_ns;
1da177e4
LT		 1579 int *valp = table->data;
1580 int val = *valp;
1581 int rc;
1582
8d65af78 1583 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1da177e4
LT		 1584 if (write && (*valp != val)) {
1585 if ((*valp < 0) || (*valp > 3)) {
1586 /* Restore the correct value */
1587 *valp = val;
1588 } else {
9330419d 1589 update_defense_level(net_ipvs(net));
1da177e4
LT		 1590 }
1591 }
1592 return rc;
1593}
1594
1da177e4 1595static int
fe2c6338 1596proc_do_sync_threshold(struct ctl_table *table, int write,
1da177e4
LT		 1597 void __user *buffer, size_t *lenp, loff_t *ppos)
1598{
1599 int *valp = table->data;
1600 int val[2];
1601 int rc;
1602
1603 /* backup the value first */
1604 memcpy(val, valp, sizeof(val));
1605
8d65af78 1606 rc = proc_dointvec(table, write, buffer, lenp, ppos);
749c42b6
JA		 1607 if (write && (valp[0] < 0 || valp[1] < 0 ||
1608 (valp[0] >= valp[1] && valp[1]))) {
1da177e4
LT		 1609 /* Restore the correct value */
1610 memcpy(valp, val, sizeof(val));
1611 }
1612 return rc;
1613}
1614
b880c1f0 1615static int
fe2c6338 1616proc_do_sync_mode(struct ctl_table *table, int write,
b880c1f0
HS		 1617 void __user *buffer, size_t *lenp, loff_t *ppos)
1618{
1619 int *valp = table->data;
1620 int val = *valp;
1621 int rc;
1622
1623 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1624 if (write && (*valp != val)) {
1625 if ((*valp < 0) || (*valp > 1)) {
1626 /* Restore the correct value */
1627 *valp = val;
f73181c8
PNA		 1628 }
1629 }
1630 return rc;
1631}
1632
1633static int
fe2c6338 1634proc_do_sync_ports(struct ctl_table *table, int write,
f73181c8
PNA		 1635 void __user *buffer, size_t *lenp, loff_t *ppos)
1636{
1637 int *valp = table->data;
1638 int val = *valp;
1639 int rc;
1640
1641 rc = proc_dointvec(table, write, buffer, lenp, ppos);
1642 if (write && (*valp != val)) {
1643 if (*valp < 1 || !is_power_of_2(*valp)) {
1644 /* Restore the correct value */
1645 *valp = val;
b880c1f0
HS		 1646 }
1647 }
1648 return rc;
1649}
1da177e4
LT		 1650
1651/*
1652 * IPVS sysctl table (under the /proc/sys/net/ipv4/vs/)
a0840e2e 1653 * Do not change order or insert new entries without
503cf15a 1654 * align with netns init in ip_vs_control_net_init()
1da177e4
LT		 1655 */
1656
1657static struct ctl_table vs_vars[] = {
1658 {
1da177e4 1659 .procname = "amemthresh",
1da177e4
LT		 1660 .maxlen = sizeof(int),
1661 .mode = 0644,
6d9f239a 1662 .proc_handler = proc_dointvec,
1da177e4 1663 },
1da177e4 1664 {
1da177e4 1665 .procname = "am_droprate",
1da177e4
LT		 1666 .maxlen = sizeof(int),
1667 .mode = 0644,
6d9f239a 1668 .proc_handler = proc_dointvec,
1da177e4
LT		 1669 },
1670 {
1da177e4 1671 .procname = "drop_entry",
1da177e4
LT		 1672 .maxlen = sizeof(int),
1673 .mode = 0644,
6d9f239a 1674 .proc_handler = proc_do_defense_mode,
1da177e4
LT		 1675 },
1676 {
1da177e4 1677 .procname = "drop_packet",
1da177e4
LT		 1678 .maxlen = sizeof(int),
1679 .mode = 0644,
6d9f239a 1680 .proc_handler = proc_do_defense_mode,
1da177e4 1681 },
f4bc17cd
JA		 1682#ifdef CONFIG_IP_VS_NFCT
1683 {
1684 .procname = "conntrack",
f4bc17cd
JA		 1685 .maxlen = sizeof(int),
1686 .mode = 0644,
1687 .proc_handler = &proc_dointvec,
1688 },
1689#endif
1da177e4 1690 {
1da177e4 1691 .procname = "secure_tcp",
1da177e4
LT		 1692 .maxlen = sizeof(int),
1693 .mode = 0644,
6d9f239a 1694 .proc_handler = proc_do_defense_mode,
1da177e4 1695 },
8a803040
JA		 1696 {
1697 .procname = "snat_reroute",
8a803040
JA		 1698 .maxlen = sizeof(int),
1699 .mode = 0644,
1700 .proc_handler = &proc_dointvec,
1701 },
b880c1f0
HS		 1702 {
1703 .procname = "sync_version",
b880c1f0
HS		 1704 .maxlen = sizeof(int),
1705 .mode = 0644,
1706 .proc_handler = &proc_do_sync_mode,
1707 },
f73181c8
PNA		 1708 {
1709 .procname = "sync_ports",
1710 .maxlen = sizeof(int),
1711 .mode = 0644,
1712 .proc_handler = &proc_do_sync_ports,
1713 },
4d0c875d
JA		 1714 {
1715 .procname = "sync_persist_mode",
1716 .maxlen = sizeof(int),
1717 .mode = 0644,
1718 .proc_handler = proc_dointvec,
1719 },
1c003b15
PNA		 1720 {
1721 .procname = "sync_qlen_max",
07995674 1722 .maxlen = sizeof(unsigned long),
1c003b15 1723 .mode = 0644,
07995674 1724 .proc_handler = proc_doulongvec_minmax,
1c003b15
PNA		 1725 },
1726 {
1727 .procname = "sync_sock_size",
1728 .maxlen = sizeof(int),
1729 .mode = 0644,
1730 .proc_handler = proc_dointvec,
1731 },
a0840e2e
HS		 1732 {
1733 .procname = "cache_bypass",
1734 .maxlen = sizeof(int),
1735 .mode = 0644,
1736 .proc_handler = proc_dointvec,
1737 },
1738 {
1739 .procname = "expire_nodest_conn",
1740 .maxlen = sizeof(int),
1741 .mode = 0644,
1742 .proc_handler = proc_dointvec,
1743 },
c6c96c18
AF		 1744 {
1745 .procname = "sloppy_tcp",
1746 .maxlen = sizeof(int),
1747 .mode = 0644,
1748 .proc_handler = proc_dointvec,
1749 },
1750 {
1751 .procname = "sloppy_sctp",
1752 .maxlen = sizeof(int),
1753 .mode = 0644,
1754 .proc_handler = proc_dointvec,
1755 },
a0840e2e
HS		 1756 {
1757 .procname = "expire_quiescent_template",
1758 .maxlen = sizeof(int),
1759 .mode = 0644,
1760 .proc_handler = proc_dointvec,
1761 },
1762 {
1763 .procname = "sync_threshold",
1764 .maxlen =
1765 sizeof(((struct netns_ipvs *)0)->sysctl_sync_threshold),
1766 .mode = 0644,
1767 .proc_handler = proc_do_sync_threshold,
1768 },
749c42b6
JA		 1769 {
1770 .procname = "sync_refresh_period",
1771 .maxlen = sizeof(int),
1772 .mode = 0644,
1773 .proc_handler = proc_dointvec_jiffies,
1774 },
1775 {
1776 .procname = "sync_retries",
1777 .maxlen = sizeof(int),
1778 .mode = 0644,
1779 .proc_handler = proc_dointvec_minmax,
1780 .extra1 = &zero,
1781 .extra2 = &three,
1782 },
a0840e2e
HS		 1783 {
1784 .procname = "nat_icmp_send",
1785 .maxlen = sizeof(int),
1786 .mode = 0644,
1787 .proc_handler = proc_dointvec,
1788 },
3654e611
JA		 1789 {
1790 .procname = "pmtu_disc",
1791 .maxlen = sizeof(int),
1792 .mode = 0644,
1793 .proc_handler = proc_dointvec,
1794 },
0c12582f
JA		 1795 {
1796 .procname = "backup_only",
1797 .maxlen = sizeof(int),
1798 .mode = 0644,
1799 .proc_handler = proc_dointvec,
1800 },
a0840e2e
HS		 1801#ifdef CONFIG_IP_VS_DEBUG
1802 {
1803 .procname = "debug_level",
1804 .data = &sysctl_ip_vs_debug_level,
1805 .maxlen = sizeof(int),
1806 .mode = 0644,
1807 .proc_handler = proc_dointvec,
1808 },
1809#endif
1da177e4
LT		 1810#if 0
1811 {
1da177e4
LT		 1812 .procname = "timeout_established",
1813 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ESTABLISHED],
1814 .maxlen = sizeof(int),
1815 .mode = 0644,
6d9f239a 1816 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1817 },
1818 {
1da177e4
LT		 1819 .procname = "timeout_synsent",
1820 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_SENT],
1821 .maxlen = sizeof(int),
1822 .mode = 0644,
6d9f239a 1823 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1824 },
1825 {
1da177e4
LT		 1826 .procname = "timeout_synrecv",
1827 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYN_RECV],
1828 .maxlen = sizeof(int),
1829 .mode = 0644,
6d9f239a 1830 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1831 },
1832 {
1da177e4
LT		 1833 .procname = "timeout_finwait",
1834 .data = &vs_timeout_table_dos.timeout[IP_VS_S_FIN_WAIT],
1835 .maxlen = sizeof(int),
1836 .mode = 0644,
6d9f239a 1837 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1838 },
1839 {
1da177e4
LT		 1840 .procname = "timeout_timewait",
1841 .data = &vs_timeout_table_dos.timeout[IP_VS_S_TIME_WAIT],
1842 .maxlen = sizeof(int),
1843 .mode = 0644,
6d9f239a 1844 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1845 },
1846 {
1da177e4
LT		 1847 .procname = "timeout_close",
1848 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE],
1849 .maxlen = sizeof(int),
1850 .mode = 0644,
6d9f239a 1851 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1852 },
1853 {
1da177e4
LT		 1854 .procname = "timeout_closewait",
1855 .data = &vs_timeout_table_dos.timeout[IP_VS_S_CLOSE_WAIT],
1856 .maxlen = sizeof(int),
1857 .mode = 0644,
6d9f239a 1858 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1859 },
1860 {
1da177e4
LT		 1861 .procname = "timeout_lastack",
1862 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LAST_ACK],
1863 .maxlen = sizeof(int),
1864 .mode = 0644,
6d9f239a 1865 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1866 },
1867 {
1da177e4
LT		 1868 .procname = "timeout_listen",
1869 .data = &vs_timeout_table_dos.timeout[IP_VS_S_LISTEN],
1870 .maxlen = sizeof(int),
1871 .mode = 0644,
6d9f239a 1872 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1873 },
1874 {
1da177e4
LT		 1875 .procname = "timeout_synack",
1876 .data = &vs_timeout_table_dos.timeout[IP_VS_S_SYNACK],
1877 .maxlen = sizeof(int),
1878 .mode = 0644,
6d9f239a 1879 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1880 },
1881 {
1da177e4
LT		 1882 .procname = "timeout_udp",
1883 .data = &vs_timeout_table_dos.timeout[IP_VS_S_UDP],
1884 .maxlen = sizeof(int),
1885 .mode = 0644,
6d9f239a 1886 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1887 },
1888 {
1da177e4
LT		 1889 .procname = "timeout_icmp",
1890 .data = &vs_timeout_table_dos.timeout[IP_VS_S_ICMP],
1891 .maxlen = sizeof(int),
1892 .mode = 0644,
6d9f239a 1893 .proc_handler = proc_dointvec_jiffies,
1da177e4
LT		 1894 },
1895#endif
f8572d8f 1896 { }
1da177e4
LT		 1897};
1898
14e40546 1899#endif
1da177e4 1900
1da177e4
LT		 1901#ifdef CONFIG_PROC_FS
1902
1903struct ip_vs_iter {
fc723250 1904 struct seq_net_private p; /* Do not move this, netns depends upon it*/
ceec4c38 1905 struct hlist_head *table;
1da177e4
LT		 1906 int bucket;
1907};
1908
1909/*
1910 * Write the contents of the VS rule table to a PROCfs file.
1911 * (It is kept just for backward compatibility)
1912 */
95c96174 1913static inline const char *ip_vs_fwd_name(unsigned int flags)
1da177e4
LT		 1914{
1915 switch (flags & IP_VS_CONN_F_FWD_MASK) {
1916 case IP_VS_CONN_F_LOCALNODE:
1917 return "Local";
1918 case IP_VS_CONN_F_TUNNEL:
1919 return "Tunnel";
1920 case IP_VS_CONN_F_DROUTE:
1921 return "Route";
1922 default:
1923 return "Masq";
1924 }
1925}
1926
1927
1928/* Get the Nth entry in the two lists */
1929static struct ip_vs_service *ip_vs_info_array(struct seq_file *seq, loff_t pos)
1930{
fc723250 1931 struct net *net = seq_file_net(seq);
1da177e4
LT		 1932 struct ip_vs_iter *iter = seq->private;
1933 int idx;
1934 struct ip_vs_service *svc;
1935
1936 /* look in hash by protocol */
1937 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 1938 hlist_for_each_entry_rcu(svc, &ip_vs_svc_table[idx], s_list) {
fc723250 1939 if (net_eq(svc->net, net) && pos-- == 0) {
1da177e4
LT		 1940 iter->table = ip_vs_svc_table;
1941 iter->bucket = idx;
1942 return svc;
1943 }
1944 }
1945 }
1946
1947 /* keep looking in fwmark */
1948 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 1949 hlist_for_each_entry_rcu(svc, &ip_vs_svc_fwm_table[idx],
1950 f_list) {
fc723250 1951 if (net_eq(svc->net, net) && pos-- == 0) {
1da177e4
LT		 1952 iter->table = ip_vs_svc_fwm_table;
1953 iter->bucket = idx;
1954 return svc;
1955 }
1956 }
1957 }
1958
1959 return NULL;
1960}
1961
1962static void *ip_vs_info_seq_start(struct seq_file *seq, loff_t *pos)
371990ee 1963 __acquires(RCU)
1da177e4 1964{
ceec4c38 1965 rcu_read_lock();
1da177e4
LT		 1966 return *pos ? ip_vs_info_array(seq, *pos - 1) : SEQ_START_TOKEN;
1967}
1968
1969
1970static void *ip_vs_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1971{
ceec4c38 1972 struct hlist_node *e;
1da177e4
LT		 1973 struct ip_vs_iter *iter;
1974 struct ip_vs_service *svc;
1975
1976 ++*pos;
1977 if (v == SEQ_START_TOKEN)
1978 return ip_vs_info_array(seq,0);
1979
1980 svc = v;
1981 iter = seq->private;
1982
1983 if (iter->table == ip_vs_svc_table) {
1984 /* next service in table hashed by protocol */
ceec4c38
JA		 1985 e = rcu_dereference(hlist_next_rcu(&svc->s_list));
1986 if (e)
1987 return hlist_entry(e, struct ip_vs_service, s_list);
1da177e4
LT		 1988
1989 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 1990 hlist_for_each_entry_rcu(svc,
1991 &ip_vs_svc_table[iter->bucket],
1992 s_list) {
1da177e4
LT		 1993 return svc;
1994 }
1995 }
1996
1997 iter->table = ip_vs_svc_fwm_table;
1998 iter->bucket = -1;
1999 goto scan_fwmark;
2000 }
2001
2002 /* next service in hashed by fwmark */
ceec4c38
JA		 2003 e = rcu_dereference(hlist_next_rcu(&svc->f_list));
2004 if (e)
2005 return hlist_entry(e, struct ip_vs_service, f_list);
1da177e4
LT		 2006
2007 scan_fwmark:
2008 while (++iter->bucket < IP_VS_SVC_TAB_SIZE) {
ceec4c38
JA		 2009 hlist_for_each_entry_rcu(svc,
2010 &ip_vs_svc_fwm_table[iter->bucket],
2011 f_list)
1da177e4
LT		 2012 return svc;
2013 }
2014
2015 return NULL;
2016}
2017
2018static void ip_vs_info_seq_stop(struct seq_file *seq, void *v)
371990ee 2019 __releases(RCU)
1da177e4 2020{
ceec4c38 2021 rcu_read_unlock();
1da177e4
LT		 2022}
2023
2024
2025static int ip_vs_info_seq_show(struct seq_file *seq, void *v)
2026{
2027 if (v == SEQ_START_TOKEN) {
2028 seq_printf(seq,
2029 "IP Virtual Server version %d.%d.%d (size=%d)\n",
6f7edb48 2030 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 2031 seq_puts(seq,
2032 "Prot LocalAddress:Port Scheduler Flags\n");
2033 seq_puts(seq,
2034 " -> RemoteAddress:Port Forward Weight ActiveConn InActConn\n");
2035 } else {
2036 const struct ip_vs_service *svc = v;
2037 const struct ip_vs_iter *iter = seq->private;
2038 const struct ip_vs_dest *dest;
ceec4c38 2039 struct ip_vs_scheduler *sched = rcu_dereference(svc->scheduler);
1da177e4 2040
667a5f18
VB		 2041 if (iter->table == ip_vs_svc_table) {
2042#ifdef CONFIG_IP_VS_IPV6
2043 if (svc->af == AF_INET6)
5b095d98 2044 seq_printf(seq, "%s [%pI6]:%04X %s ",
667a5f18 2045 ip_vs_proto_name(svc->protocol),
38ff4fa4 2046 &svc->addr.in6,
667a5f18 2047 ntohs(svc->port),
ceec4c38 2048 sched->name);
667a5f18
VB		 2049 else
2050#endif
26ec037f 2051 seq_printf(seq, "%s %08X:%04X %s %s ",
667a5f18
VB		 2052 ip_vs_proto_name(svc->protocol),
2053 ntohl(svc->addr.ip),
2054 ntohs(svc->port),
ceec4c38 2055 sched->name,
26ec037f 2056 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 2057 } else {
26ec037f 2058 seq_printf(seq, "FWM %08X %s %s",
ceec4c38 2059 svc->fwmark, sched->name,
26ec037f 2060 (svc->flags & IP_VS_SVC_F_ONEPACKET)?"ops ":"");
667a5f18 2061 }
1da177e4
LT		 2062
2063 if (svc->flags & IP_VS_SVC_F_PERSISTENT)
2064 seq_printf(seq, "persistent %d %08X\n",
2065 svc->timeout,
2066 ntohl(svc->netmask));
2067 else
2068 seq_putc(seq, '\n');
2069
413c2d04 2070 list_for_each_entry_rcu(dest, &svc->destinations, n_list) {
667a5f18
VB		 2071#ifdef CONFIG_IP_VS_IPV6
2072 if (dest->af == AF_INET6)
2073 seq_printf(seq,
5b095d98 2074 " -> [%pI6]:%04X"
667a5f18 2075 " %-7s %-6d %-10d %-10d\n",
38ff4fa4 2076 &dest->addr.in6,
667a5f18
VB		 2077 ntohs(dest->port),
2078 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2079 atomic_read(&dest->weight),
2080 atomic_read(&dest->activeconns),
2081 atomic_read(&dest->inactconns));
2082 else
2083#endif
2084 seq_printf(seq,
2085 " -> %08X:%04X "
2086 "%-7s %-6d %-10d %-10d\n",
2087 ntohl(dest->addr.ip),
2088 ntohs(dest->port),
2089 ip_vs_fwd_name(atomic_read(&dest->conn_flags)),
2090 atomic_read(&dest->weight),
2091 atomic_read(&dest->activeconns),
2092 atomic_read(&dest->inactconns));
2093
1da177e4
LT		 2094 }
2095 }
2096 return 0;
2097}
2098
56b3d975 2099static const struct seq_operations ip_vs_info_seq_ops = {
1da177e4
LT		 2100 .start = ip_vs_info_seq_start,
2101 .next = ip_vs_info_seq_next,
2102 .stop = ip_vs_info_seq_stop,
2103 .show = ip_vs_info_seq_show,
2104};
2105
2106static int ip_vs_info_open(struct inode *inode, struct file *file)
2107{
fc723250 2108 return seq_open_net(inode, file, &ip_vs_info_seq_ops,
cf7732e4 2109 sizeof(struct ip_vs_iter));
1da177e4
LT		 2110}
2111
9a32144e 2112static const struct file_operations ip_vs_info_fops = {
1da177e4
LT		 2113 .owner = THIS_MODULE,
2114 .open = ip_vs_info_open,
2115 .read = seq_read,
2116 .llseek = seq_lseek,
0f08190f 2117 .release = seq_release_net,
1da177e4
LT		 2118};
2119
1da177e4
LT		 2120static int ip_vs_stats_show(struct seq_file *seq, void *v)
2121{
b17fc996 2122 struct net *net = seq_file_single_net(seq);
55a3d4e1 2123 struct ip_vs_stats_user show;
1da177e4
LT		 2124
2125/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2126 seq_puts(seq,
2127 " Total Incoming Outgoing Incoming Outgoing\n");
2128 seq_printf(seq,
2129 " Conns Packets Packets Bytes Bytes\n");
2130
55a3d4e1
JA		 2131 ip_vs_copy_stats(&show, &net_ipvs(net)->tot_stats);
2132 seq_printf(seq, "%8X %8X %8X %16LX %16LX\n\n", show.conns,
2133 show.inpkts, show.outpkts,
2134 (unsigned long long) show.inbytes,
2135 (unsigned long long) show.outbytes);
1da177e4
LT		 2136
2137/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2138 seq_puts(seq,
2139 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
55a3d4e1
JA		 2140 seq_printf(seq, "%8X %8X %8X %16X %16X\n",
2141 show.cps, show.inpps, show.outpps,
2142 show.inbps, show.outbps);
1da177e4
LT		 2143
2144 return 0;
2145}
2146
2147static int ip_vs_stats_seq_open(struct inode *inode, struct file *file)
2148{
fc723250 2149 return single_open_net(inode, file, ip_vs_stats_show);
1da177e4
LT		 2150}
2151
9a32144e 2152static const struct file_operations ip_vs_stats_fops = {
1da177e4
LT		 2153 .owner = THIS_MODULE,
2154 .open = ip_vs_stats_seq_open,
2155 .read = seq_read,
2156 .llseek = seq_lseek,
0f08190f 2157 .release = single_release_net,
1da177e4
LT		 2158};
2159
b17fc996
HS		 2160static int ip_vs_stats_percpu_show(struct seq_file *seq, void *v)
2161{
2162 struct net *net = seq_file_single_net(seq);
2a0751af 2163 struct ip_vs_stats *tot_stats = &net_ipvs(net)->tot_stats;
371990ee 2164 struct ip_vs_cpu_stats __percpu *cpustats = tot_stats->cpustats;
ea9f22cc 2165 struct ip_vs_stats_user rates;
b17fc996
HS		 2166 int i;
2167
2168/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2169 seq_puts(seq,
2170 " Total Incoming Outgoing Incoming Outgoing\n");
2171 seq_printf(seq,
2172 "CPU Conns Packets Packets Bytes Bytes\n");
2173
2174 for_each_possible_cpu(i) {
2a0751af
JA		 2175 struct ip_vs_cpu_stats *u = per_cpu_ptr(cpustats, i);
2176 unsigned int start;
2177 __u64 inbytes, outbytes;
2178
2179 do {
2180 start = u64_stats_fetch_begin_bh(&u->syncp);
2181 inbytes = u->ustats.inbytes;
2182 outbytes = u->ustats.outbytes;
2183 } while (u64_stats_fetch_retry_bh(&u->syncp, start));
2184
b17fc996 2185 seq_printf(seq, "%3X %8X %8X %8X %16LX %16LX\n",
2a0751af
JA		 2186 i, u->ustats.conns, u->ustats.inpkts,
2187 u->ustats.outpkts, (__u64)inbytes,
2188 (__u64)outbytes);
b17fc996
HS		 2189 }
2190
2191 spin_lock_bh(&tot_stats->lock);
ea9f22cc 2192
b17fc996
HS		 2193 seq_printf(seq, " ~ %8X %8X %8X %16LX %16LX\n\n",
2194 tot_stats->ustats.conns, tot_stats->ustats.inpkts,
2195 tot_stats->ustats.outpkts,
2196 (unsigned long long) tot_stats->ustats.inbytes,
2197 (unsigned long long) tot_stats->ustats.outbytes);
2198
ea9f22cc
JA		 2199 ip_vs_read_estimator(&rates, tot_stats);
2200
2201 spin_unlock_bh(&tot_stats->lock);
2202
b17fc996
HS		 2203/* 01234567 01234567 01234567 0123456701234567 0123456701234567 */
2204 seq_puts(seq,
2205 " Conns/s Pkts/s Pkts/s Bytes/s Bytes/s\n");
2206 seq_printf(seq, " %8X %8X %8X %16X %16X\n",
ea9f22cc
JA		 2207 rates.cps,
2208 rates.inpps,
2209 rates.outpps,
2210 rates.inbps,
2211 rates.outbps);
b17fc996
HS		 2212
2213 return 0;
2214}
2215
2216static int ip_vs_stats_percpu_seq_open(struct inode *inode, struct file *file)
2217{
2218 return single_open_net(inode, file, ip_vs_stats_percpu_show);
2219}
2220
2221static const struct file_operations ip_vs_stats_percpu_fops = {
2222 .owner = THIS_MODULE,
2223 .open = ip_vs_stats_percpu_seq_open,
2224 .read = seq_read,
2225 .llseek = seq_lseek,
0f08190f 2226 .release = single_release_net,
b17fc996 2227};
1da177e4
LT		 2228#endif
2229
2230/*
2231 * Set timeout values for tcp tcpfin udp in the timeout_table.
2232 */
9330419d 2233static int ip_vs_set_timeout(struct net *net, struct ip_vs_timeout_user *u)
1da177e4 2234{
091bb34c 2235#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2236 struct ip_vs_proto_data *pd;
091bb34c 2237#endif
9330419d 2238
1da177e4
LT		 2239 IP_VS_DBG(2, "Setting timeout tcp:%d tcpfin:%d udp:%d\n",
2240 u->tcp_timeout,
2241 u->tcp_fin_timeout,
2242 u->udp_timeout);
2243
2244#ifdef CONFIG_IP_VS_PROTO_TCP
2245 if (u->tcp_timeout) {
9330419d
HS		 2246 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2247 pd->timeout_table[IP_VS_TCP_S_ESTABLISHED]
1da177e4
LT		 2248 = u->tcp_timeout * HZ;
2249 }
2250
2251 if (u->tcp_fin_timeout) {
9330419d
HS		 2252 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2253 pd->timeout_table[IP_VS_TCP_S_FIN_WAIT]
1da177e4
LT		 2254 = u->tcp_fin_timeout * HZ;
2255 }
2256#endif
2257
2258#ifdef CONFIG_IP_VS_PROTO_UDP
2259 if (u->udp_timeout) {
9330419d
HS		 2260 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
2261 pd->timeout_table[IP_VS_UDP_S_NORMAL]
1da177e4
LT		 2262 = u->udp_timeout * HZ;
2263 }
2264#endif
2265 return 0;
2266}
2267
2268
2269#define SET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2270#define SERVICE_ARG_LEN (sizeof(struct ip_vs_service_user))
2271#define SVCDEST_ARG_LEN (sizeof(struct ip_vs_service_user) + \
2272 sizeof(struct ip_vs_dest_user))
2273#define TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2274#define DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user))
2275#define MAX_ARG_LEN SVCDEST_ARG_LEN
2276
9b5b5cff 2277static const unsigned char set_arglen[SET_CMDID(IP_VS_SO_SET_MAX)+1] = {
1da177e4
LT		 2278 [SET_CMDID(IP_VS_SO_SET_ADD)] = SERVICE_ARG_LEN,
2279 [SET_CMDID(IP_VS_SO_SET_EDIT)] = SERVICE_ARG_LEN,
2280 [SET_CMDID(IP_VS_SO_SET_DEL)] = SERVICE_ARG_LEN,
2281 [SET_CMDID(IP_VS_SO_SET_FLUSH)] = 0,
2282 [SET_CMDID(IP_VS_SO_SET_ADDDEST)] = SVCDEST_ARG_LEN,
2283 [SET_CMDID(IP_VS_SO_SET_DELDEST)] = SVCDEST_ARG_LEN,
2284 [SET_CMDID(IP_VS_SO_SET_EDITDEST)] = SVCDEST_ARG_LEN,
2285 [SET_CMDID(IP_VS_SO_SET_TIMEOUT)] = TIMEOUT_ARG_LEN,
2286 [SET_CMDID(IP_VS_SO_SET_STARTDAEMON)] = DAEMON_ARG_LEN,
2287 [SET_CMDID(IP_VS_SO_SET_STOPDAEMON)] = DAEMON_ARG_LEN,
2288 [SET_CMDID(IP_VS_SO_SET_ZERO)] = SERVICE_ARG_LEN,
2289};
2290
c860c6b1
JV		 2291static void ip_vs_copy_usvc_compat(struct ip_vs_service_user_kern *usvc,
2292 struct ip_vs_service_user *usvc_compat)
2293{
0d1e71b0
SH		 2294 memset(usvc, 0, sizeof(*usvc));
2295
c860c6b1
JV		 2296 usvc->af = AF_INET;
2297 usvc->protocol = usvc_compat->protocol;
2298 usvc->addr.ip = usvc_compat->addr;
2299 usvc->port = usvc_compat->port;
2300 usvc->fwmark = usvc_compat->fwmark;
2301
2302 /* Deep copy of sched_name is not needed here */
2303 usvc->sched_name = usvc_compat->sched_name;
2304
2305 usvc->flags = usvc_compat->flags;
2306 usvc->timeout = usvc_compat->timeout;
2307 usvc->netmask = usvc_compat->netmask;
2308}
2309
2310static void ip_vs_copy_udest_compat(struct ip_vs_dest_user_kern *udest,
2311 struct ip_vs_dest_user *udest_compat)
2312{
0d1e71b0
SH		 2313 memset(udest, 0, sizeof(*udest));
2314
c860c6b1
JV		 2315 udest->addr.ip = udest_compat->addr;
2316 udest->port = udest_compat->port;
2317 udest->conn_flags = udest_compat->conn_flags;
2318 udest->weight = udest_compat->weight;
2319 udest->u_threshold = udest_compat->u_threshold;
2320 udest->l_threshold = udest_compat->l_threshold;
2321}
2322
1da177e4
LT		 2323static int
2324do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len)
2325{
fc723250 2326 struct net *net = sock_net(sk);
1da177e4
LT		 2327 int ret;
2328 unsigned char arg[MAX_ARG_LEN];
c860c6b1
JV		 2329 struct ip_vs_service_user *usvc_compat;
2330 struct ip_vs_service_user_kern usvc;
1da177e4 2331 struct ip_vs_service *svc;
c860c6b1
JV		 2332 struct ip_vs_dest_user *udest_compat;
2333 struct ip_vs_dest_user_kern udest;
ae1d48b2 2334 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2335
df008c91 2336 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2337 return -EPERM;
2338
04bcef2a
AV		 2339 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_SET_MAX)
2340 return -EINVAL;
2341 if (len < 0 || len > MAX_ARG_LEN)
2342 return -EINVAL;
1da177e4 2343 if (len != set_arglen[SET_CMDID(cmd)]) {
1e3e238e
HE		 2344 pr_err("set_ctl: len %u != %u\n",
2345 len, set_arglen[SET_CMDID(cmd)]);
1da177e4
LT		 2346 return -EINVAL;
2347 }
2348
2349 if (copy_from_user(arg, user, len) != 0)
2350 return -EFAULT;
2351
2352 /* increase the module use count */
2353 ip_vs_use_count_inc();
2354
ae1d48b2
HS		 2355 /* Handle daemons since they have another lock */
2356 if (cmd == IP_VS_SO_SET_STARTDAEMON ||
2357 cmd == IP_VS_SO_SET_STOPDAEMON) {
2358 struct ip_vs_daemon_user *dm = (struct ip_vs_daemon_user *)arg;
2359
2360 if (mutex_lock_interruptible(&ipvs->sync_mutex)) {
2361 ret = -ERESTARTSYS;
2362 goto out_dec;
2363 }
2364 if (cmd == IP_VS_SO_SET_STARTDAEMON)
2365 ret = start_sync_thread(net, dm->state, dm->mcast_ifn,
2366 dm->syncid);
2367 else
2368 ret = stop_sync_thread(net, dm->state);
2369 mutex_unlock(&ipvs->sync_mutex);
2370 goto out_dec;
2371 }
2372
14cc3e2b 2373 if (mutex_lock_interruptible(&__ip_vs_mutex)) {
1da177e4
LT		 2374 ret = -ERESTARTSYS;
2375 goto out_dec;
2376 }
2377
2378 if (cmd == IP_VS_SO_SET_FLUSH) {
2379 /* Flush the virtual service */
578bc3ef 2380 ret = ip_vs_flush(net, false);
1da177e4
LT		 2381 goto out_unlock;
2382 } else if (cmd == IP_VS_SO_SET_TIMEOUT) {
2383 /* Set timeout values for (tcp tcpfin udp) */
9330419d 2384 ret = ip_vs_set_timeout(net, (struct ip_vs_timeout_user *)arg);
1da177e4 2385 goto out_unlock;
1da177e4
LT		 2386 }
2387
c860c6b1
JV		 2388 usvc_compat = (struct ip_vs_service_user *)arg;
2389 udest_compat = (struct ip_vs_dest_user *)(usvc_compat + 1);
2390
2391 /* We only use the new structs internally, so copy userspace compat
2392 * structs to extended internal versions */
2393 ip_vs_copy_usvc_compat(&usvc, usvc_compat);
2394 ip_vs_copy_udest_compat(&udest, udest_compat);
1da177e4
LT		 2395
2396 if (cmd == IP_VS_SO_SET_ZERO) {
2397 /* if no service address is set, zero counters in all */
c860c6b1 2398 if (!usvc.fwmark && !usvc.addr.ip && !usvc.port) {
fc723250 2399 ret = ip_vs_zero_all(net);
1da177e4
LT		 2400 goto out_unlock;
2401 }
2402 }
2403
2906f66a
VMR		 2404 /* Check for valid protocol: TCP or UDP or SCTP, even for fwmark!=0 */
2405 if (usvc.protocol != IPPROTO_TCP && usvc.protocol != IPPROTO_UDP &&
2406 usvc.protocol != IPPROTO_SCTP) {
1e3e238e
HE		 2407 pr_err("set_ctl: invalid protocol: %d %pI4:%d %s\n",
2408 usvc.protocol, &usvc.addr.ip,
2409 ntohs(usvc.port), usvc.sched_name);
1da177e4
LT		 2410 ret = -EFAULT;
2411 goto out_unlock;
2412 }
2413
2414 /* Lookup the exact service by <protocol, addr, port> or fwmark */
ceec4c38 2415 rcu_read_lock();
c860c6b1 2416 if (usvc.fwmark == 0)
fc723250 2417 svc = __ip_vs_service_find(net, usvc.af, usvc.protocol,
26c15cfd 2418 &usvc.addr, usvc.port);
1da177e4 2419 else
fc723250 2420 svc = __ip_vs_svc_fwm_find(net, usvc.af, usvc.fwmark);
ceec4c38 2421 rcu_read_unlock();
1da177e4
LT		 2422
2423 if (cmd != IP_VS_SO_SET_ADD
c860c6b1 2424 && (svc == NULL || svc->protocol != usvc.protocol)) {
1da177e4 2425 ret = -ESRCH;
26c15cfd 2426 goto out_unlock;
1da177e4
LT		 2427 }
2428
2429 switch (cmd) {
2430 case IP_VS_SO_SET_ADD:
2431 if (svc != NULL)
2432 ret = -EEXIST;
2433 else
fc723250 2434 ret = ip_vs_add_service(net, &usvc, &svc);
1da177e4
LT		 2435 break;
2436 case IP_VS_SO_SET_EDIT:
c860c6b1 2437 ret = ip_vs_edit_service(svc, &usvc);
1da177e4
LT		 2438 break;
2439 case IP_VS_SO_SET_DEL:
2440 ret = ip_vs_del_service(svc);
2441 if (!ret)
2442 goto out_unlock;
2443 break;
2444 case IP_VS_SO_SET_ZERO:
2445 ret = ip_vs_zero_service(svc);
2446 break;
2447 case IP_VS_SO_SET_ADDDEST:
c860c6b1 2448 ret = ip_vs_add_dest(svc, &udest);
1da177e4
LT		 2449 break;
2450 case IP_VS_SO_SET_EDITDEST:
c860c6b1 2451 ret = ip_vs_edit_dest(svc, &udest);
1da177e4
LT		 2452 break;
2453 case IP_VS_SO_SET_DELDEST:
c860c6b1 2454 ret = ip_vs_del_dest(svc, &udest);
1da177e4
LT		 2455 break;
2456 default:
2457 ret = -EINVAL;
2458 }
2459
1da177e4 2460 out_unlock:
14cc3e2b 2461 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2462 out_dec:
2463 /* decrease the module use count */
2464 ip_vs_use_count_dec();
2465
2466 return ret;
2467}
2468
2469
1da177e4
LT		 2470static void
2471ip_vs_copy_service(struct ip_vs_service_entry *dst, struct ip_vs_service *src)
2472{
ceec4c38
JA		 2473 struct ip_vs_scheduler *sched;
2474
2475 sched = rcu_dereference_protected(src->scheduler, 1);
1da177e4 2476 dst->protocol = src->protocol;
e7ade46a 2477 dst->addr = src->addr.ip;
1da177e4
LT		 2478 dst->port = src->port;
2479 dst->fwmark = src->fwmark;
ceec4c38 2480 strlcpy(dst->sched_name, sched->name, sizeof(dst->sched_name));
1da177e4
LT		 2481 dst->flags = src->flags;
2482 dst->timeout = src->timeout / HZ;
2483 dst->netmask = src->netmask;
2484 dst->num_dests = src->num_dests;
2485 ip_vs_copy_stats(&dst->stats, &src->stats);
2486}
2487
2488static inline int
fc723250
HS		 2489__ip_vs_get_service_entries(struct net *net,
2490 const struct ip_vs_get_services *get,
1da177e4
LT		 2491 struct ip_vs_get_services __user *uptr)
2492{
2493 int idx, count=0;
2494 struct ip_vs_service *svc;
2495 struct ip_vs_service_entry entry;
2496 int ret = 0;
2497
2498 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2499 hlist_for_each_entry(svc, &ip_vs_svc_table[idx], s_list) {
f94fd041 2500 /* Only expose IPv4 entries to old interface */
fc723250 2501 if (svc->af != AF_INET || !net_eq(svc->net, net))
f94fd041
JV		 2502 continue;
2503
1da177e4
LT		 2504 if (count >= get->num_services)
2505 goto out;
4da62fc7 2506 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2507 ip_vs_copy_service(&entry, svc);
2508 if (copy_to_user(&uptr->entrytable[count],
2509 &entry, sizeof(entry))) {
2510 ret = -EFAULT;
2511 goto out;
2512 }
2513 count++;
2514 }
2515 }
2516
2517 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38 2518 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[idx], f_list) {
f94fd041 2519 /* Only expose IPv4 entries to old interface */
fc723250 2520 if (svc->af != AF_INET || !net_eq(svc->net, net))
f94fd041
JV		 2521 continue;
2522
1da177e4
LT		 2523 if (count >= get->num_services)
2524 goto out;
4da62fc7 2525 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2526 ip_vs_copy_service(&entry, svc);
2527 if (copy_to_user(&uptr->entrytable[count],
2528 &entry, sizeof(entry))) {
2529 ret = -EFAULT;
2530 goto out;
2531 }
2532 count++;
2533 }
2534 }
552ad65a 2535out:
1da177e4
LT		 2536 return ret;
2537}
2538
2539static inline int
fc723250 2540__ip_vs_get_dest_entries(struct net *net, const struct ip_vs_get_dests *get,
1da177e4
LT		 2541 struct ip_vs_get_dests __user *uptr)
2542{
2543 struct ip_vs_service *svc;
b18610de 2544 union nf_inet_addr addr = { .ip = get->addr };
1da177e4
LT		 2545 int ret = 0;
2546
ceec4c38 2547 rcu_read_lock();
1da177e4 2548 if (get->fwmark)
fc723250 2549 svc = __ip_vs_svc_fwm_find(net, AF_INET, get->fwmark);
1da177e4 2550 else
fc723250 2551 svc = __ip_vs_service_find(net, AF_INET, get->protocol, &addr,
26c15cfd 2552 get->port);
ceec4c38 2553 rcu_read_unlock();
b18610de 2554
1da177e4
LT		 2555 if (svc) {
2556 int count = 0;
2557 struct ip_vs_dest *dest;
2558 struct ip_vs_dest_entry entry;
2559
a8241c63 2560 memset(&entry, 0, sizeof(entry));
1da177e4
LT		 2561 list_for_each_entry(dest, &svc->destinations, n_list) {
2562 if (count >= get->num_dests)
2563 break;
2564
e7ade46a 2565 entry.addr = dest->addr.ip;
1da177e4
LT		 2566 entry.port = dest->port;
2567 entry.conn_flags = atomic_read(&dest->conn_flags);
2568 entry.weight = atomic_read(&dest->weight);
2569 entry.u_threshold = dest->u_threshold;
2570 entry.l_threshold = dest->l_threshold;
2571 entry.activeconns = atomic_read(&dest->activeconns);
2572 entry.inactconns = atomic_read(&dest->inactconns);
2573 entry.persistconns = atomic_read(&dest->persistconns);
2574 ip_vs_copy_stats(&entry.stats, &dest->stats);
2575 if (copy_to_user(&uptr->entrytable[count],
2576 &entry, sizeof(entry))) {
2577 ret = -EFAULT;
2578 break;
2579 }
2580 count++;
2581 }
1da177e4
LT		 2582 } else
2583 ret = -ESRCH;
2584 return ret;
2585}
2586
2587static inline void
9330419d 2588__ip_vs_get_timeouts(struct net *net, struct ip_vs_timeout_user *u)
1da177e4 2589{
091bb34c 2590#if defined(CONFIG_IP_VS_PROTO_TCP) || defined(CONFIG_IP_VS_PROTO_UDP)
9330419d 2591 struct ip_vs_proto_data *pd;
091bb34c 2592#endif
9330419d 2593
b61a602e
AB		 2594 memset(u, 0, sizeof (*u));
2595
1da177e4 2596#ifdef CONFIG_IP_VS_PROTO_TCP
9330419d
HS		 2597 pd = ip_vs_proto_data_get(net, IPPROTO_TCP);
2598 u->tcp_timeout = pd->timeout_table[IP_VS_TCP_S_ESTABLISHED] / HZ;
2599 u->tcp_fin_timeout = pd->timeout_table[IP_VS_TCP_S_FIN_WAIT] / HZ;
1da177e4
LT		 2600#endif
2601#ifdef CONFIG_IP_VS_PROTO_UDP
9330419d 2602 pd = ip_vs_proto_data_get(net, IPPROTO_UDP);
1da177e4 2603 u->udp_timeout =
9330419d 2604 pd->timeout_table[IP_VS_UDP_S_NORMAL] / HZ;
1da177e4
LT		 2605#endif
2606}
2607
2608
2609#define GET_CMDID(cmd) (cmd - IP_VS_BASE_CTL)
2610#define GET_INFO_ARG_LEN (sizeof(struct ip_vs_getinfo))
2611#define GET_SERVICES_ARG_LEN (sizeof(struct ip_vs_get_services))
2612#define GET_SERVICE_ARG_LEN (sizeof(struct ip_vs_service_entry))
2613#define GET_DESTS_ARG_LEN (sizeof(struct ip_vs_get_dests))
2614#define GET_TIMEOUT_ARG_LEN (sizeof(struct ip_vs_timeout_user))
2615#define GET_DAEMON_ARG_LEN (sizeof(struct ip_vs_daemon_user) * 2)
2616
9b5b5cff 2617static const unsigned char get_arglen[GET_CMDID(IP_VS_SO_GET_MAX)+1] = {
1da177e4
LT		 2618 [GET_CMDID(IP_VS_SO_GET_VERSION)] = 64,
2619 [GET_CMDID(IP_VS_SO_GET_INFO)] = GET_INFO_ARG_LEN,
2620 [GET_CMDID(IP_VS_SO_GET_SERVICES)] = GET_SERVICES_ARG_LEN,
2621 [GET_CMDID(IP_VS_SO_GET_SERVICE)] = GET_SERVICE_ARG_LEN,
2622 [GET_CMDID(IP_VS_SO_GET_DESTS)] = GET_DESTS_ARG_LEN,
2623 [GET_CMDID(IP_VS_SO_GET_TIMEOUT)] = GET_TIMEOUT_ARG_LEN,
2624 [GET_CMDID(IP_VS_SO_GET_DAEMON)] = GET_DAEMON_ARG_LEN,
2625};
2626
2627static int
2628do_ip_vs_get_ctl(struct sock *sk, int cmd, void __user *user, int *len)
2629{
2630 unsigned char arg[128];
2631 int ret = 0;
04bcef2a 2632 unsigned int copylen;
fc723250 2633 struct net *net = sock_net(sk);
f131315f 2634 struct netns_ipvs *ipvs = net_ipvs(net);
1da177e4 2635
fc723250 2636 BUG_ON(!net);
df008c91 2637 if (!ns_capable(sock_net(sk)->user_ns, CAP_NET_ADMIN))
1da177e4
LT		 2638 return -EPERM;
2639
04bcef2a
AV		 2640 if (cmd < IP_VS_BASE_CTL || cmd > IP_VS_SO_GET_MAX)
2641 return -EINVAL;
2642
1da177e4 2643 if (*len < get_arglen[GET_CMDID(cmd)]) {
1e3e238e
HE		 2644 pr_err("get_ctl: len %u < %u\n",
2645 *len, get_arglen[GET_CMDID(cmd)]);
1da177e4
LT		 2646 return -EINVAL;
2647 }
2648
04bcef2a
AV		 2649 copylen = get_arglen[GET_CMDID(cmd)];
2650 if (copylen > 128)
2651 return -EINVAL;
2652
2653 if (copy_from_user(arg, user, copylen) != 0)
1da177e4 2654 return -EFAULT;
ae1d48b2
HS		 2655 /*
2656 * Handle daemons first since it has its own locking
2657 */
2658 if (cmd == IP_VS_SO_GET_DAEMON) {
2659 struct ip_vs_daemon_user d[2];
2660
2661 memset(&d, 0, sizeof(d));
2662 if (mutex_lock_interruptible(&ipvs->sync_mutex))
2663 return -ERESTARTSYS;
2664
2665 if (ipvs->sync_state & IP_VS_STATE_MASTER) {
2666 d[0].state = IP_VS_STATE_MASTER;
2667 strlcpy(d[0].mcast_ifn, ipvs->master_mcast_ifn,
2668 sizeof(d[0].mcast_ifn));
2669 d[0].syncid = ipvs->master_syncid;
2670 }
2671 if (ipvs->sync_state & IP_VS_STATE_BACKUP) {
2672 d[1].state = IP_VS_STATE_BACKUP;
2673 strlcpy(d[1].mcast_ifn, ipvs->backup_mcast_ifn,
2674 sizeof(d[1].mcast_ifn));
2675 d[1].syncid = ipvs->backup_syncid;
2676 }
2677 if (copy_to_user(user, &d, sizeof(d)) != 0)
2678 ret = -EFAULT;
2679 mutex_unlock(&ipvs->sync_mutex);
2680 return ret;
2681 }
1da177e4 2682
14cc3e2b 2683 if (mutex_lock_interruptible(&__ip_vs_mutex))
1da177e4
LT		 2684 return -ERESTARTSYS;
2685
2686 switch (cmd) {
2687 case IP_VS_SO_GET_VERSION:
2688 {
2689 char buf[64];
2690
2691 sprintf(buf, "IP Virtual Server version %d.%d.%d (size=%d)",
6f7edb48 2692 NVERSION(IP_VS_VERSION_CODE), ip_vs_conn_tab_size);
1da177e4
LT		 2693 if (copy_to_user(user, buf, strlen(buf)+1) != 0) {
2694 ret = -EFAULT;
2695 goto out;
2696 }
2697 *len = strlen(buf)+1;
2698 }
2699 break;
2700
2701 case IP_VS_SO_GET_INFO:
2702 {
2703 struct ip_vs_getinfo info;
2704 info.version = IP_VS_VERSION_CODE;
6f7edb48 2705 info.size = ip_vs_conn_tab_size;
a0840e2e 2706 info.num_services = ipvs->num_services;
1da177e4
LT		 2707 if (copy_to_user(user, &info, sizeof(info)) != 0)
2708 ret = -EFAULT;
2709 }
2710 break;
2711
2712 case IP_VS_SO_GET_SERVICES:
2713 {
2714 struct ip_vs_get_services *get;
2715 int size;
2716
2717 get = (struct ip_vs_get_services *)arg;
2718 size = sizeof(*get) +
2719 sizeof(struct ip_vs_service_entry) * get->num_services;
2720 if (*len != size) {
1e3e238e 2721 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2722 ret = -EINVAL;
2723 goto out;
2724 }
fc723250 2725 ret = __ip_vs_get_service_entries(net, get, user);
1da177e4
LT		 2726 }
2727 break;
2728
2729 case IP_VS_SO_GET_SERVICE:
2730 {
2731 struct ip_vs_service_entry *entry;
2732 struct ip_vs_service *svc;
b18610de 2733 union nf_inet_addr addr;
1da177e4
LT		 2734
2735 entry = (struct ip_vs_service_entry *)arg;
b18610de 2736 addr.ip = entry->addr;
ceec4c38 2737 rcu_read_lock();
1da177e4 2738 if (entry->fwmark)
fc723250 2739 svc = __ip_vs_svc_fwm_find(net, AF_INET, entry->fwmark);
1da177e4 2740 else
fc723250
HS		 2741 svc = __ip_vs_service_find(net, AF_INET,
2742 entry->protocol, &addr,
2743 entry->port);
ceec4c38 2744 rcu_read_unlock();
1da177e4
LT		 2745 if (svc) {
2746 ip_vs_copy_service(entry, svc);
2747 if (copy_to_user(user, entry, sizeof(*entry)) != 0)
2748 ret = -EFAULT;
1da177e4
LT		 2749 } else
2750 ret = -ESRCH;
2751 }
2752 break;
2753
2754 case IP_VS_SO_GET_DESTS:
2755 {
2756 struct ip_vs_get_dests *get;
2757 int size;
2758
2759 get = (struct ip_vs_get_dests *)arg;
2760 size = sizeof(*get) +
2761 sizeof(struct ip_vs_dest_entry) * get->num_dests;
2762 if (*len != size) {
1e3e238e 2763 pr_err("length: %u != %u\n", *len, size);
1da177e4
LT		 2764 ret = -EINVAL;
2765 goto out;
2766 }
fc723250 2767 ret = __ip_vs_get_dest_entries(net, get, user);
1da177e4
LT		 2768 }
2769 break;
2770
2771 case IP_VS_SO_GET_TIMEOUT:
2772 {
2773 struct ip_vs_timeout_user t;
2774
9330419d 2775 __ip_vs_get_timeouts(net, &t);
1da177e4
LT		 2776 if (copy_to_user(user, &t, sizeof(t)) != 0)
2777 ret = -EFAULT;
2778 }
2779 break;
2780
1da177e4
LT		 2781 default:
2782 ret = -EINVAL;
2783 }
2784
552ad65a 2785out:
14cc3e2b 2786 mutex_unlock(&__ip_vs_mutex);
1da177e4
LT		 2787 return ret;
2788}
2789
2790
2791static struct nf_sockopt_ops ip_vs_sockopts = {
2792 .pf = PF_INET,
2793 .set_optmin = IP_VS_BASE_CTL,
2794 .set_optmax = IP_VS_SO_SET_MAX+1,
2795 .set = do_ip_vs_set_ctl,
2796 .get_optmin = IP_VS_BASE_CTL,
2797 .get_optmax = IP_VS_SO_GET_MAX+1,
2798 .get = do_ip_vs_get_ctl,
16fcec35 2799 .owner = THIS_MODULE,
1da177e4
LT		 2800};
2801
9a812198
JV		 2802/*
2803 * Generic Netlink interface
2804 */
2805
2806/* IPVS genetlink family */
2807static struct genl_family ip_vs_genl_family = {
2808 .id = GENL_ID_GENERATE,
2809 .hdrsize = 0,
2810 .name = IPVS_GENL_NAME,
2811 .version = IPVS_GENL_VERSION,
2812 .maxattr = IPVS_CMD_MAX,
c6d2d445 2813 .netnsok = true, /* Make ipvsadm to work on netns */
9a812198
JV		 2814};
2815
2816/* Policy used for first-level command attributes */
2817static const struct nla_policy ip_vs_cmd_policy[IPVS_CMD_ATTR_MAX + 1] = {
2818 [IPVS_CMD_ATTR_SERVICE] = { .type = NLA_NESTED },
2819 [IPVS_CMD_ATTR_DEST] = { .type = NLA_NESTED },
2820 [IPVS_CMD_ATTR_DAEMON] = { .type = NLA_NESTED },
2821 [IPVS_CMD_ATTR_TIMEOUT_TCP] = { .type = NLA_U32 },
2822 [IPVS_CMD_ATTR_TIMEOUT_TCP_FIN] = { .type = NLA_U32 },
2823 [IPVS_CMD_ATTR_TIMEOUT_UDP] = { .type = NLA_U32 },
2824};
2825
2826/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DAEMON */
2827static const struct nla_policy ip_vs_daemon_policy[IPVS_DAEMON_ATTR_MAX + 1] = {
2828 [IPVS_DAEMON_ATTR_STATE] = { .type = NLA_U32 },
2829 [IPVS_DAEMON_ATTR_MCAST_IFN] = { .type = NLA_NUL_STRING,
2830 .len = IP_VS_IFNAME_MAXLEN },
2831 [IPVS_DAEMON_ATTR_SYNC_ID] = { .type = NLA_U32 },
2832};
2833
2834/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_SERVICE */
2835static const struct nla_policy ip_vs_svc_policy[IPVS_SVC_ATTR_MAX + 1] = {
2836 [IPVS_SVC_ATTR_AF] = { .type = NLA_U16 },
2837 [IPVS_SVC_ATTR_PROTOCOL] = { .type = NLA_U16 },
2838 [IPVS_SVC_ATTR_ADDR] = { .type = NLA_BINARY,
2839 .len = sizeof(union nf_inet_addr) },
2840 [IPVS_SVC_ATTR_PORT] = { .type = NLA_U16 },
2841 [IPVS_SVC_ATTR_FWMARK] = { .type = NLA_U32 },
2842 [IPVS_SVC_ATTR_SCHED_NAME] = { .type = NLA_NUL_STRING,
2843 .len = IP_VS_SCHEDNAME_MAXLEN },
0d1e71b0
SH		 2844 [IPVS_SVC_ATTR_PE_NAME] = { .type = NLA_NUL_STRING,
2845 .len = IP_VS_PENAME_MAXLEN },
9a812198
JV		 2846 [IPVS_SVC_ATTR_FLAGS] = { .type = NLA_BINARY,
2847 .len = sizeof(struct ip_vs_flags) },
2848 [IPVS_SVC_ATTR_TIMEOUT] = { .type = NLA_U32 },
2849 [IPVS_SVC_ATTR_NETMASK] = { .type = NLA_U32 },
2850 [IPVS_SVC_ATTR_STATS] = { .type = NLA_NESTED },
2851};
2852
2853/* Policy used for attributes in nested attribute IPVS_CMD_ATTR_DEST */
2854static const struct nla_policy ip_vs_dest_policy[IPVS_DEST_ATTR_MAX + 1] = {
2855 [IPVS_DEST_ATTR_ADDR] = { .type = NLA_BINARY,
2856 .len = sizeof(union nf_inet_addr) },
2857 [IPVS_DEST_ATTR_PORT] = { .type = NLA_U16 },
2858 [IPVS_DEST_ATTR_FWD_METHOD] = { .type = NLA_U32 },
2859 [IPVS_DEST_ATTR_WEIGHT] = { .type = NLA_U32 },
2860 [IPVS_DEST_ATTR_U_THRESH] = { .type = NLA_U32 },
2861 [IPVS_DEST_ATTR_L_THRESH] = { .type = NLA_U32 },
2862 [IPVS_DEST_ATTR_ACTIVE_CONNS] = { .type = NLA_U32 },
2863 [IPVS_DEST_ATTR_INACT_CONNS] = { .type = NLA_U32 },
2864 [IPVS_DEST_ATTR_PERSIST_CONNS] = { .type = NLA_U32 },
2865 [IPVS_DEST_ATTR_STATS] = { .type = NLA_NESTED },
2866};
2867
2868static int ip_vs_genl_fill_stats(struct sk_buff *skb, int container_type,
2869 struct ip_vs_stats *stats)
2870{
55a3d4e1 2871 struct ip_vs_stats_user ustats;
9a812198
JV		 2872 struct nlattr *nl_stats = nla_nest_start(skb, container_type);
2873 if (!nl_stats)
2874 return -EMSGSIZE;
2875
55a3d4e1 2876 ip_vs_copy_stats(&ustats, stats);
9a812198 2877
969e8e25
DM		 2878 if (nla_put_u32(skb, IPVS_STATS_ATTR_CONNS, ustats.conns) ||
2879 nla_put_u32(skb, IPVS_STATS_ATTR_INPKTS, ustats.inpkts) ||
2880 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPKTS, ustats.outpkts) ||
2881 nla_put_u64(skb, IPVS_STATS_ATTR_INBYTES, ustats.inbytes) ||
2882 nla_put_u64(skb, IPVS_STATS_ATTR_OUTBYTES, ustats.outbytes) ||
2883 nla_put_u32(skb, IPVS_STATS_ATTR_CPS, ustats.cps) ||
2884 nla_put_u32(skb, IPVS_STATS_ATTR_INPPS, ustats.inpps) ||
2885 nla_put_u32(skb, IPVS_STATS_ATTR_OUTPPS, ustats.outpps) ||
2886 nla_put_u32(skb, IPVS_STATS_ATTR_INBPS, ustats.inbps) ||
2887 nla_put_u32(skb, IPVS_STATS_ATTR_OUTBPS, ustats.outbps))
2888 goto nla_put_failure;
9a812198
JV		 2889 nla_nest_end(skb, nl_stats);
2890
2891 return 0;
2892
2893nla_put_failure:
9a812198
JV		 2894 nla_nest_cancel(skb, nl_stats);
2895 return -EMSGSIZE;
2896}
2897
2898static int ip_vs_genl_fill_service(struct sk_buff *skb,
2899 struct ip_vs_service *svc)
2900{
ceec4c38 2901 struct ip_vs_scheduler *sched;
371990ee 2902 struct ip_vs_pe *pe;
9a812198
JV		 2903 struct nlattr *nl_service;
2904 struct ip_vs_flags flags = { .flags = svc->flags,
2905 .mask = ~0 };
2906
2907 nl_service = nla_nest_start(skb, IPVS_CMD_ATTR_SERVICE);
2908 if (!nl_service)
2909 return -EMSGSIZE;
2910
969e8e25
DM		 2911 if (nla_put_u16(skb, IPVS_SVC_ATTR_AF, svc->af))
2912 goto nla_put_failure;
9a812198 2913 if (svc->fwmark) {
969e8e25
DM		 2914 if (nla_put_u32(skb, IPVS_SVC_ATTR_FWMARK, svc->fwmark))
2915 goto nla_put_failure;
9a812198 2916 } else {
969e8e25
DM		 2917 if (nla_put_u16(skb, IPVS_SVC_ATTR_PROTOCOL, svc->protocol) ||
2918 nla_put(skb, IPVS_SVC_ATTR_ADDR, sizeof(svc->addr), &svc->addr) ||
0a925864 2919 nla_put_be16(skb, IPVS_SVC_ATTR_PORT, svc->port))
969e8e25 2920 goto nla_put_failure;
9a812198
JV		 2921 }
2922
ceec4c38 2923 sched = rcu_dereference_protected(svc->scheduler, 1);
371990ee 2924 pe = rcu_dereference_protected(svc->pe, 1);
ceec4c38 2925 if (nla_put_string(skb, IPVS_SVC_ATTR_SCHED_NAME, sched->name) ||
371990ee 2926 (pe && nla_put_string(skb, IPVS_SVC_ATTR_PE_NAME, pe->name)) ||
969e8e25
DM		 2927 nla_put(skb, IPVS_SVC_ATTR_FLAGS, sizeof(flags), &flags) ||
2928 nla_put_u32(skb, IPVS_SVC_ATTR_TIMEOUT, svc->timeout / HZ) ||
0a925864 2929 nla_put_be32(skb, IPVS_SVC_ATTR_NETMASK, svc->netmask))
969e8e25 2930 goto nla_put_failure;
9a812198
JV		 2931 if (ip_vs_genl_fill_stats(skb, IPVS_SVC_ATTR_STATS, &svc->stats))
2932 goto nla_put_failure;
2933
2934 nla_nest_end(skb, nl_service);
2935
2936 return 0;
2937
2938nla_put_failure:
2939 nla_nest_cancel(skb, nl_service);
2940 return -EMSGSIZE;
2941}
2942
2943static int ip_vs_genl_dump_service(struct sk_buff *skb,
2944 struct ip_vs_service *svc,
2945 struct netlink_callback *cb)
2946{
2947 void *hdr;
2948
15e47304 2949 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 2950 &ip_vs_genl_family, NLM_F_MULTI,
2951 IPVS_CMD_NEW_SERVICE);
2952 if (!hdr)
2953 return -EMSGSIZE;
2954
2955 if (ip_vs_genl_fill_service(skb, svc) < 0)
2956 goto nla_put_failure;
2957
2958 return genlmsg_end(skb, hdr);
2959
2960nla_put_failure:
2961 genlmsg_cancel(skb, hdr);
2962 return -EMSGSIZE;
2963}
2964
2965static int ip_vs_genl_dump_services(struct sk_buff *skb,
2966 struct netlink_callback *cb)
2967{
2968 int idx = 0, i;
2969 int start = cb->args[0];
2970 struct ip_vs_service *svc;
fc723250 2971 struct net *net = skb_sknet(skb);
9a812198
JV		 2972
2973 mutex_lock(&__ip_vs_mutex);
2974 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 2975 hlist_for_each_entry(svc, &ip_vs_svc_table[i], s_list) {
fc723250 2976 if (++idx <= start || !net_eq(svc->net, net))
9a812198
JV		 2977 continue;
2978 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2979 idx--;
2980 goto nla_put_failure;
2981 }
2982 }
2983 }
2984
2985 for (i = 0; i < IP_VS_SVC_TAB_SIZE; i++) {
ceec4c38 2986 hlist_for_each_entry(svc, &ip_vs_svc_fwm_table[i], f_list) {
fc723250 2987 if (++idx <= start || !net_eq(svc->net, net))
9a812198
JV		 2988 continue;
2989 if (ip_vs_genl_dump_service(skb, svc, cb) < 0) {
2990 idx--;
2991 goto nla_put_failure;
2992 }
2993 }
2994 }
2995
2996nla_put_failure:
2997 mutex_unlock(&__ip_vs_mutex);
2998 cb->args[0] = idx;
2999
3000 return skb->len;
3001}
3002
fc723250
HS		 3003static int ip_vs_genl_parse_service(struct net *net,
3004 struct ip_vs_service_user_kern *usvc,
26c15cfd
JA		 3005 struct nlattr *nla, int full_entry,
3006 struct ip_vs_service **ret_svc)
9a812198
JV		 3007{
3008 struct nlattr *attrs[IPVS_SVC_ATTR_MAX + 1];
3009 struct nlattr *nla_af, *nla_port, *nla_fwmark, *nla_protocol, *nla_addr;
26c15cfd 3010 struct ip_vs_service *svc;
9a812198
JV		 3011
3012 /* Parse mandatory identifying service fields first */
3013 if (nla == NULL ||
3014 nla_parse_nested(attrs, IPVS_SVC_ATTR_MAX, nla, ip_vs_svc_policy))
3015 return -EINVAL;
3016
3017 nla_af = attrs[IPVS_SVC_ATTR_AF];
3018 nla_protocol = attrs[IPVS_SVC_ATTR_PROTOCOL];
3019 nla_addr = attrs[IPVS_SVC_ATTR_ADDR];
3020 nla_port = attrs[IPVS_SVC_ATTR_PORT];
3021 nla_fwmark = attrs[IPVS_SVC_ATTR_FWMARK];
3022
3023 if (!(nla_af && (nla_fwmark || (nla_port && nla_protocol && nla_addr))))
3024 return -EINVAL;
3025
258c8893
SH		 3026 memset(usvc, 0, sizeof(*usvc));
3027
c860c6b1 3028 usvc->af = nla_get_u16(nla_af);
f94fd041
JV		 3029#ifdef CONFIG_IP_VS_IPV6
3030 if (usvc->af != AF_INET && usvc->af != AF_INET6)
3031#else
3032 if (usvc->af != AF_INET)
3033#endif
9a812198
JV		 3034 return -EAFNOSUPPORT;
3035
3036 if (nla_fwmark) {
3037 usvc->protocol = IPPROTO_TCP;
3038 usvc->fwmark = nla_get_u32(nla_fwmark);
3039 } else {
3040 usvc->protocol = nla_get_u16(nla_protocol);
3041 nla_memcpy(&usvc->addr, nla_addr, sizeof(usvc->addr));
0a925864 3042 usvc->port = nla_get_be16(nla_port);
9a812198
JV		 3043 usvc->fwmark = 0;
3044 }
3045
ceec4c38 3046 rcu_read_lock();
26c15cfd 3047 if (usvc->fwmark)
fc723250 3048 svc = __ip_vs_svc_fwm_find(net, usvc->af, usvc->fwmark);
26c15cfd 3049 else
fc723250 3050 svc = __ip_vs_service_find(net, usvc->af, usvc->protocol,
26c15cfd 3051 &usvc->addr, usvc->port);
ceec4c38 3052 rcu_read_unlock();
26c15cfd
JA		 3053 *ret_svc = svc;
3054
9a812198
JV		 3055 /* If a full entry was requested, check for the additional fields */
3056 if (full_entry) {
0d1e71b0 3057 struct nlattr *nla_sched, *nla_flags, *nla_pe, *nla_timeout,
9a812198
JV		 3058 *nla_netmask;
3059 struct ip_vs_flags flags;
9a812198
JV		 3060
3061 nla_sched = attrs[IPVS_SVC_ATTR_SCHED_NAME];
0d1e71b0 3062 nla_pe = attrs[IPVS_SVC_ATTR_PE_NAME];
9a812198
JV		 3063 nla_flags = attrs[IPVS_SVC_ATTR_FLAGS];
3064 nla_timeout = attrs[IPVS_SVC_ATTR_TIMEOUT];
3065 nla_netmask = attrs[IPVS_SVC_ATTR_NETMASK];
3066
3067 if (!(nla_sched && nla_flags && nla_timeout && nla_netmask))
3068 return -EINVAL;
3069
3070 nla_memcpy(&flags, nla_flags, sizeof(flags));
3071
3072 /* prefill flags from service if it already exists */
26c15cfd 3073 if (svc)
9a812198 3074 usvc->flags = svc->flags;
9a812198
JV		 3075
3076 /* set new flags from userland */
3077 usvc->flags = (usvc->flags & ~flags.mask) |
3078 (flags.flags & flags.mask);
c860c6b1 3079 usvc->sched_name = nla_data(nla_sched);
0d1e71b0 3080 usvc->pe_name = nla_pe ? nla_data(nla_pe) : NULL;
9a812198 3081 usvc->timeout = nla_get_u32(nla_timeout);
0a925864 3082 usvc->netmask = nla_get_be32(nla_netmask);
9a812198
JV		 3083 }
3084
3085 return 0;
3086}
3087
fc723250
HS		 3088static struct ip_vs_service *ip_vs_genl_find_service(struct net *net,
3089 struct nlattr *nla)
9a812198 3090{
c860c6b1 3091 struct ip_vs_service_user_kern usvc;
26c15cfd 3092 struct ip_vs_service *svc;
9a812198
JV		 3093 int ret;
3094
fc723250 3095 ret = ip_vs_genl_parse_service(net, &usvc, nla, 0, &svc);
26c15cfd 3096 return ret ? ERR_PTR(ret) : svc;
9a812198
JV		 3097}
3098
3099static int ip_vs_genl_fill_dest(struct sk_buff *skb, struct ip_vs_dest *dest)
3100{
3101 struct nlattr *nl_dest;
3102
3103 nl_dest = nla_nest_start(skb, IPVS_CMD_ATTR_DEST);
3104 if (!nl_dest)
3105 return -EMSGSIZE;
3106
969e8e25 3107 if (nla_put(skb, IPVS_DEST_ATTR_ADDR, sizeof(dest->addr), &dest->addr) ||
0a925864 3108 nla_put_be16(skb, IPVS_DEST_ATTR_PORT, dest->port) ||
969e8e25
DM		 3109 nla_put_u32(skb, IPVS_DEST_ATTR_FWD_METHOD,
3110 (atomic_read(&dest->conn_flags) &
3111 IP_VS_CONN_F_FWD_MASK)) ||
3112 nla_put_u32(skb, IPVS_DEST_ATTR_WEIGHT,
3113 atomic_read(&dest->weight)) ||
3114 nla_put_u32(skb, IPVS_DEST_ATTR_U_THRESH, dest->u_threshold) ||
3115 nla_put_u32(skb, IPVS_DEST_ATTR_L_THRESH, dest->l_threshold) ||
3116 nla_put_u32(skb, IPVS_DEST_ATTR_ACTIVE_CONNS,
3117 atomic_read(&dest->activeconns)) ||
3118 nla_put_u32(skb, IPVS_DEST_ATTR_INACT_CONNS,
3119 atomic_read(&dest->inactconns)) ||
3120 nla_put_u32(skb, IPVS_DEST_ATTR_PERSIST_CONNS,
3121 atomic_read(&dest->persistconns)))
3122 goto nla_put_failure;
9a812198
JV		 3123 if (ip_vs_genl_fill_stats(skb, IPVS_DEST_ATTR_STATS, &dest->stats))
3124 goto nla_put_failure;
3125
3126 nla_nest_end(skb, nl_dest);
3127
3128 return 0;
3129
3130nla_put_failure:
3131 nla_nest_cancel(skb, nl_dest);
3132 return -EMSGSIZE;
3133}
3134
3135static int ip_vs_genl_dump_dest(struct sk_buff *skb, struct ip_vs_dest *dest,
3136 struct netlink_callback *cb)
3137{
3138 void *hdr;
3139
15e47304 3140 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3141 &ip_vs_genl_family, NLM_F_MULTI,
3142 IPVS_CMD_NEW_DEST);
3143 if (!hdr)
3144 return -EMSGSIZE;
3145
3146 if (ip_vs_genl_fill_dest(skb, dest) < 0)
3147 goto nla_put_failure;
3148
3149 return genlmsg_end(skb, hdr);
3150
3151nla_put_failure:
3152 genlmsg_cancel(skb, hdr);
3153 return -EMSGSIZE;
3154}
3155
3156static int ip_vs_genl_dump_dests(struct sk_buff *skb,
3157 struct netlink_callback *cb)
3158{
3159 int idx = 0;
3160 int start = cb->args[0];
3161 struct ip_vs_service *svc;
3162 struct ip_vs_dest *dest;
3163 struct nlattr *attrs[IPVS_CMD_ATTR_MAX + 1];
a0840e2e 3164 struct net *net = skb_sknet(skb);
9a812198
JV		 3165
3166 mutex_lock(&__ip_vs_mutex);
3167
3168 /* Try to find the service for which to dump destinations */
3169 if (nlmsg_parse(cb->nlh, GENL_HDRLEN, attrs,
3170 IPVS_CMD_ATTR_MAX, ip_vs_cmd_policy))
3171 goto out_err;
3172
a0840e2e 3173
fc723250 3174 svc = ip_vs_genl_find_service(net, attrs[IPVS_CMD_ATTR_SERVICE]);
9a812198
JV		 3175 if (IS_ERR(svc) || svc == NULL)
3176 goto out_err;
3177
3178 /* Dump the destinations */
3179 list_for_each_entry(dest, &svc->destinations, n_list) {
3180 if (++idx <= start)
3181 continue;
3182 if (ip_vs_genl_dump_dest(skb, dest, cb) < 0) {
3183 idx--;
3184 goto nla_put_failure;
3185 }
3186 }
3187
3188nla_put_failure:
3189 cb->args[0] = idx;
9a812198
JV		 3190
3191out_err:
3192 mutex_unlock(&__ip_vs_mutex);
3193
3194 return skb->len;
3195}
3196
c860c6b1 3197static int ip_vs_genl_parse_dest(struct ip_vs_dest_user_kern *udest,
9a812198
JV		 3198 struct nlattr *nla, int full_entry)
3199{
3200 struct nlattr *attrs[IPVS_DEST_ATTR_MAX + 1];
3201 struct nlattr *nla_addr, *nla_port;
3202
3203 /* Parse mandatory identifying destination fields first */
3204 if (nla == NULL ||
3205 nla_parse_nested(attrs, IPVS_DEST_ATTR_MAX, nla, ip_vs_dest_policy))
3206 return -EINVAL;
3207
3208 nla_addr = attrs[IPVS_DEST_ATTR_ADDR];
3209 nla_port = attrs[IPVS_DEST_ATTR_PORT];
3210
3211 if (!(nla_addr && nla_port))
3212 return -EINVAL;
3213
258c8893
SH		 3214 memset(udest, 0, sizeof(*udest));
3215
9a812198 3216 nla_memcpy(&udest->addr, nla_addr, sizeof(udest->addr));
0a925864 3217 udest->port = nla_get_be16(nla_port);
9a812198
JV		 3218
3219 /* If a full entry was requested, check for the additional fields */
3220 if (full_entry) {
3221 struct nlattr *nla_fwd, *nla_weight, *nla_u_thresh,
3222 *nla_l_thresh;
3223
3224 nla_fwd = attrs[IPVS_DEST_ATTR_FWD_METHOD];
3225 nla_weight = attrs[IPVS_DEST_ATTR_WEIGHT];
3226 nla_u_thresh = attrs[IPVS_DEST_ATTR_U_THRESH];
3227 nla_l_thresh = attrs[IPVS_DEST_ATTR_L_THRESH];
3228
3229 if (!(nla_fwd && nla_weight && nla_u_thresh && nla_l_thresh))
3230 return -EINVAL;
3231
3232 udest->conn_flags = nla_get_u32(nla_fwd)
3233 & IP_VS_CONN_F_FWD_MASK;
3234 udest->weight = nla_get_u32(nla_weight);
3235 udest->u_threshold = nla_get_u32(nla_u_thresh);
3236 udest->l_threshold = nla_get_u32(nla_l_thresh);
3237 }
3238
3239 return 0;
3240}
3241
0a925864
JA		 3242static int ip_vs_genl_fill_daemon(struct sk_buff *skb, __u32 state,
3243 const char *mcast_ifn, __u32 syncid)
9a812198
JV		 3244{
3245 struct nlattr *nl_daemon;
3246
3247 nl_daemon = nla_nest_start(skb, IPVS_CMD_ATTR_DAEMON);
3248 if (!nl_daemon)
3249 return -EMSGSIZE;
3250
969e8e25
DM		 3251 if (nla_put_u32(skb, IPVS_DAEMON_ATTR_STATE, state) ||
3252 nla_put_string(skb, IPVS_DAEMON_ATTR_MCAST_IFN, mcast_ifn) ||
3253 nla_put_u32(skb, IPVS_DAEMON_ATTR_SYNC_ID, syncid))
3254 goto nla_put_failure;
9a812198
JV		 3255 nla_nest_end(skb, nl_daemon);
3256
3257 return 0;
3258
3259nla_put_failure:
3260 nla_nest_cancel(skb, nl_daemon);
3261 return -EMSGSIZE;
3262}
3263
0a925864
JA		 3264static int ip_vs_genl_dump_daemon(struct sk_buff *skb, __u32 state,
3265 const char *mcast_ifn, __u32 syncid,
9a812198
JV		 3266 struct netlink_callback *cb)
3267{
3268 void *hdr;
15e47304 3269 hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
9a812198
JV		 3270 &ip_vs_genl_family, NLM_F_MULTI,
3271 IPVS_CMD_NEW_DAEMON);
3272 if (!hdr)
3273 return -EMSGSIZE;
3274
3275 if (ip_vs_genl_fill_daemon(skb, state, mcast_ifn, syncid))
3276 goto nla_put_failure;
3277
3278 return genlmsg_end(skb, hdr);
3279
3280nla_put_failure:
3281 genlmsg_cancel(skb, hdr);
3282 return -EMSGSIZE;
3283}
3284
3285static int ip_vs_genl_dump_daemons(struct sk_buff *skb,
3286 struct netlink_callback *cb)
3287{
a09d1977 3288 struct net *net = skb_sknet(skb);
f131315f
HS		 3289 struct netns_ipvs *ipvs = net_ipvs(net);
3290
ae1d48b2 3291 mutex_lock(&ipvs->sync_mutex);
f131315f 3292 if ((ipvs->sync_state & IP_VS_STATE_MASTER) && !cb->args[0]) {
9a812198 3293 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_MASTER,
f131315f
HS		 3294 ipvs->master_mcast_ifn,
3295 ipvs->master_syncid, cb) < 0)
9a812198
JV		 3296 goto nla_put_failure;
3297
3298 cb->args[0] = 1;
3299 }
3300
f131315f 3301 if ((ipvs->sync_state & IP_VS_STATE_BACKUP) && !cb->args[1]) {
9a812198 3302 if (ip_vs_genl_dump_daemon(skb, IP_VS_STATE_BACKUP,
f131315f
HS		 3303 ipvs->backup_mcast_ifn,
3304 ipvs->backup_syncid, cb) < 0)
9a812198
JV		 3305 goto nla_put_failure;
3306
3307 cb->args[1] = 1;
3308 }
3309
3310nla_put_failure:
ae1d48b2 3311 mutex_unlock(&ipvs->sync_mutex);
9a812198
JV		 3312
3313 return skb->len;
3314}
3315
f131315f 3316static int ip_vs_genl_new_daemon(struct net *net, struct nlattr **attrs)
9a812198
JV		 3317{
3318 if (!(attrs[IPVS_DAEMON_ATTR_STATE] &&
3319 attrs[IPVS_DAEMON_ATTR_MCAST_IFN] &&
3320 attrs[IPVS_DAEMON_ATTR_SYNC_ID]))
3321 return -EINVAL;
3322
f131315f
HS		 3323 return start_sync_thread(net,
3324 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]),
9a812198
JV		 3325 nla_data(attrs[IPVS_DAEMON_ATTR_MCAST_IFN]),
3326 nla_get_u32(attrs[IPVS_DAEMON_ATTR_SYNC_ID]));
3327}
3328
f131315f 3329static int ip_vs_genl_del_daemon(struct net *net, struct nlattr **attrs)
9a812198
JV		 3330{
3331 if (!attrs[IPVS_DAEMON_ATTR_STATE])
3332 return -EINVAL;
3333
f131315f
HS		 3334 return stop_sync_thread(net,
3335 nla_get_u32(attrs[IPVS_DAEMON_ATTR_STATE]));
9a812198
JV		 3336}
3337
9330419d 3338static int ip_vs_genl_set_config(struct net *net, struct nlattr **attrs)
9a812198
JV		 3339{
3340 struct ip_vs_timeout_user t;
3341
9330419d 3342 __ip_vs_get_timeouts(net, &t);
9a812198
JV		 3343
3344 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP])
3345 t.tcp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP]);
3346
3347 if (attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN])
3348 t.tcp_fin_timeout =
3349 nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_TCP_FIN]);
3350
3351 if (attrs[IPVS_CMD_ATTR_TIMEOUT_UDP])
3352 t.udp_timeout = nla_get_u32(attrs[IPVS_CMD_ATTR_TIMEOUT_UDP]);
3353
9330419d 3354 return ip_vs_set_timeout(net, &t);
9a812198
JV		 3355}
3356
ae1d48b2 3357static int ip_vs_genl_set_daemon(struct sk_buff *skb, struct genl_info *info)
9a812198 3358{
9a812198 3359 int ret = 0, cmd;
fc723250 3360 struct net *net;
a0840e2e 3361 struct netns_ipvs *ipvs;
9a812198 3362
fc723250 3363 net = skb_sknet(skb);
a0840e2e 3364 ipvs = net_ipvs(net);
9a812198
JV		 3365 cmd = info->genlhdr->cmd;
3366
ae1d48b2 3367 if (cmd == IPVS_CMD_NEW_DAEMON || cmd == IPVS_CMD_DEL_DAEMON) {
9a812198
JV		 3368 struct nlattr *daemon_attrs[IPVS_DAEMON_ATTR_MAX + 1];
3369
ae1d48b2 3370 mutex_lock(&ipvs->sync_mutex);
9a812198
JV		 3371 if (!info->attrs[IPVS_CMD_ATTR_DAEMON] ||
3372 nla_parse_nested(daemon_attrs, IPVS_DAEMON_ATTR_MAX,
3373 info->attrs[IPVS_CMD_ATTR_DAEMON],
3374 ip_vs_daemon_policy)) {
3375 ret = -EINVAL;
3376 goto out;
3377 }
3378
3379 if (cmd == IPVS_CMD_NEW_DAEMON)
f131315f 3380 ret = ip_vs_genl_new_daemon(net, daemon_attrs);
9a812198 3381 else
f131315f 3382 ret = ip_vs_genl_del_daemon(net, daemon_attrs);
ae1d48b2
HS		 3383out:
3384 mutex_unlock(&ipvs->sync_mutex);
3385 }
3386 return ret;
3387}
3388
3389static int ip_vs_genl_set_cmd(struct sk_buff *skb, struct genl_info *info)
3390{
3391 struct ip_vs_service *svc = NULL;
3392 struct ip_vs_service_user_kern usvc;
3393 struct ip_vs_dest_user_kern udest;
3394 int ret = 0, cmd;
3395 int need_full_svc = 0, need_full_dest = 0;
3396 struct net *net;
ae1d48b2
HS		 3397
3398 net = skb_sknet(skb);
ae1d48b2
HS		 3399 cmd = info->genlhdr->cmd;
3400
3401 mutex_lock(&__ip_vs_mutex);
3402
3403 if (cmd == IPVS_CMD_FLUSH) {
578bc3ef 3404 ret = ip_vs_flush(net, false);
ae1d48b2
HS		 3405 goto out;
3406 } else if (cmd == IPVS_CMD_SET_CONFIG) {
3407 ret = ip_vs_genl_set_config(net, info->attrs);
9a812198
JV		 3408 goto out;
3409 } else if (cmd == IPVS_CMD_ZERO &&
3410 !info->attrs[IPVS_CMD_ATTR_SERVICE]) {
fc723250 3411 ret = ip_vs_zero_all(net);
9a812198
JV		 3412 goto out;
3413 }
3414
3415 /* All following commands require a service argument, so check if we
3416 * received a valid one. We need a full service specification when
3417 * adding / editing a service. Only identifying members otherwise. */
3418 if (cmd == IPVS_CMD_NEW_SERVICE || cmd == IPVS_CMD_SET_SERVICE)
3419 need_full_svc = 1;
3420
fc723250 3421 ret = ip_vs_genl_parse_service(net, &usvc,
9a812198 3422 info->attrs[IPVS_CMD_ATTR_SERVICE],
26c15cfd 3423 need_full_svc, &svc);
9a812198
JV		 3424 if (ret)
3425 goto out;
3426
9a812198
JV		 3427 /* Unless we're adding a new service, the service must already exist */
3428 if ((cmd != IPVS_CMD_NEW_SERVICE) && (svc == NULL)) {
3429 ret = -ESRCH;
3430 goto out;
3431 }
3432
3433 /* Destination commands require a valid destination argument. For
3434 * adding / editing a destination, we need a full destination
3435 * specification. */
3436 if (cmd == IPVS_CMD_NEW_DEST || cmd == IPVS_CMD_SET_DEST ||
3437 cmd == IPVS_CMD_DEL_DEST) {
3438 if (cmd != IPVS_CMD_DEL_DEST)
3439 need_full_dest = 1;
3440
3441 ret = ip_vs_genl_parse_dest(&udest,
3442 info->attrs[IPVS_CMD_ATTR_DEST],
3443 need_full_dest);
3444 if (ret)
3445 goto out;
3446 }
3447
3448 switch (cmd) {
3449 case IPVS_CMD_NEW_SERVICE:
3450 if (svc == NULL)
fc723250 3451 ret = ip_vs_add_service(net, &usvc, &svc);
9a812198
JV		 3452 else
3453 ret = -EEXIST;
3454 break;
3455 case IPVS_CMD_SET_SERVICE:
3456 ret = ip_vs_edit_service(svc, &usvc);
3457 break;
3458 case IPVS_CMD_DEL_SERVICE:
3459 ret = ip_vs_del_service(svc);
26c15cfd 3460 /* do not use svc, it can be freed */
9a812198
JV		 3461 break;
3462 case IPVS_CMD_NEW_DEST:
3463 ret = ip_vs_add_dest(svc, &udest);
3464 break;
3465 case IPVS_CMD_SET_DEST:
3466 ret = ip_vs_edit_dest(svc, &udest);
3467 break;
3468 case IPVS_CMD_DEL_DEST:
3469 ret = ip_vs_del_dest(svc, &udest);
3470 break;
3471 case IPVS_CMD_ZERO:
3472 ret = ip_vs_zero_service(svc);
3473 break;
3474 default:
3475 ret = -EINVAL;
3476 }
3477
3478out:
9a812198
JV		 3479 mutex_unlock(&__ip_vs_mutex);
3480
3481 return ret;
3482}
3483
3484static int ip_vs_genl_get_cmd(struct sk_buff *skb, struct genl_info *info)
3485{
3486 struct sk_buff *msg;
3487 void *reply;
3488 int ret, cmd, reply_cmd;
fc723250 3489 struct net *net;
9a812198 3490
fc723250 3491 net = skb_sknet(skb);
9a812198
JV		 3492 cmd = info->genlhdr->cmd;
3493
3494 if (cmd == IPVS_CMD_GET_SERVICE)
3495 reply_cmd = IPVS_CMD_NEW_SERVICE;
3496 else if (cmd == IPVS_CMD_GET_INFO)
3497 reply_cmd = IPVS_CMD_SET_INFO;
3498 else if (cmd == IPVS_CMD_GET_CONFIG)
3499 reply_cmd = IPVS_CMD_SET_CONFIG;
3500 else {
1e3e238e 3501 pr_err("unknown Generic Netlink command\n");
9a812198
JV		 3502 return -EINVAL;
3503 }
3504
3505 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
3506 if (!msg)
3507 return -ENOMEM;
3508
3509 mutex_lock(&__ip_vs_mutex);
3510
3511 reply = genlmsg_put_reply(msg, info, &ip_vs_genl_family, 0, reply_cmd);
3512 if (reply == NULL)
3513 goto nla_put_failure;
3514
3515 switch (cmd) {
3516 case IPVS_CMD_GET_SERVICE:
3517 {
3518 struct ip_vs_service *svc;
3519
fc723250
HS		 3520 svc = ip_vs_genl_find_service(net,
3521 info->attrs[IPVS_CMD_ATTR_SERVICE]);
9a812198
JV		 3522 if (IS_ERR(svc)) {
3523 ret = PTR_ERR(svc);
3524 goto out_err;
3525 } else if (svc) {
3526 ret = ip_vs_genl_fill_service(msg, svc);
9a812198
JV		 3527 if (ret)
3528 goto nla_put_failure;
3529 } else {
3530 ret = -ESRCH;
3531 goto out_err;
3532 }
3533
3534 break;
3535 }
3536
3537 case IPVS_CMD_GET_CONFIG:
3538 {
3539 struct ip_vs_timeout_user t;
3540
9330419d 3541 __ip_vs_get_timeouts(net, &t);
9a812198 3542#ifdef CONFIG_IP_VS_PROTO_TCP
969e8e25
DM		 3543 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP,
3544 t.tcp_timeout) ||
3545 nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_TCP_FIN,
3546 t.tcp_fin_timeout))
3547 goto nla_put_failure;
9a812198
JV		 3548#endif
3549#ifdef CONFIG_IP_VS_PROTO_UDP
969e8e25
DM		 3550 if (nla_put_u32(msg, IPVS_CMD_ATTR_TIMEOUT_UDP, t.udp_timeout))
3551 goto nla_put_failure;
9a812198
JV		 3552#endif
3553
3554 break;
3555 }
3556
3557 case IPVS_CMD_GET_INFO:
969e8e25
DM		 3558 if (nla_put_u32(msg, IPVS_INFO_ATTR_VERSION,
3559 IP_VS_VERSION_CODE) ||
3560 nla_put_u32(msg, IPVS_INFO_ATTR_CONN_TAB_SIZE,
3561 ip_vs_conn_tab_size))
3562 goto nla_put_failure;
9a812198
JV		 3563 break;
3564 }
3565
3566 genlmsg_end(msg, reply);
134e6375 3567 ret = genlmsg_reply(msg, info);
9a812198
JV		 3568 goto out;
3569
3570nla_put_failure:
1e3e238e 3571 pr_err("not enough space in Netlink message\n");
9a812198
JV		 3572 ret = -EMSGSIZE;
3573
3574out_err:
3575 nlmsg_free(msg);
3576out:
3577 mutex_unlock(&__ip_vs_mutex);
3578
3579 return ret;
3580}
3581
3582
4534de83 3583static const struct genl_ops ip_vs_genl_ops[] __read_mostly = {
9a812198
JV		 3584 {
3585 .cmd = IPVS_CMD_NEW_SERVICE,
3586 .flags = GENL_ADMIN_PERM,
3587 .policy = ip_vs_cmd_policy,
3588 .doit = ip_vs_genl_set_cmd,
3589 },
3590 {
3591 .cmd = IPVS_CMD_SET_SERVICE,
3592 .flags = GENL_ADMIN_PERM,
3593 .policy = ip_vs_cmd_policy,
3594 .doit = ip_vs_genl_set_cmd,
3595 },
3596 {
3597 .cmd = IPVS_CMD_DEL_SERVICE,
3598 .flags = GENL_ADMIN_PERM,
3599 .policy = ip_vs_cmd_policy,
3600 .doit = ip_vs_genl_set_cmd,
3601 },
3602 {
3603 .cmd = IPVS_CMD_GET_SERVICE,
3604 .flags = GENL_ADMIN_PERM,
3605 .doit = ip_vs_genl_get_cmd,
3606 .dumpit = ip_vs_genl_dump_services,
3607 .policy = ip_vs_cmd_policy,
3608 },
3609 {
3610 .cmd = IPVS_CMD_NEW_DEST,
3611 .flags = GENL_ADMIN_PERM,
3612 .policy = ip_vs_cmd_policy,
3613 .doit = ip_vs_genl_set_cmd,
3614 },
3615 {
3616 .cmd = IPVS_CMD_SET_DEST,
3617 .flags = GENL_ADMIN_PERM,
3618 .policy = ip_vs_cmd_policy,
3619 .doit = ip_vs_genl_set_cmd,
3620 },
3621 {
3622 .cmd = IPVS_CMD_DEL_DEST,
3623 .flags = GENL_ADMIN_PERM,
3624 .policy = ip_vs_cmd_policy,
3625 .doit = ip_vs_genl_set_cmd,
3626 },
3627 {
3628 .cmd = IPVS_CMD_GET_DEST,
3629 .flags = GENL_ADMIN_PERM,
3630 .policy = ip_vs_cmd_policy,
3631 .dumpit = ip_vs_genl_dump_dests,
3632 },
3633 {
3634 .cmd = IPVS_CMD_NEW_DAEMON,
3635 .flags = GENL_ADMIN_PERM,
3636 .policy = ip_vs_cmd_policy,
ae1d48b2 3637 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3638 },
3639 {
3640 .cmd = IPVS_CMD_DEL_DAEMON,
3641 .flags = GENL_ADMIN_PERM,
3642 .policy = ip_vs_cmd_policy,
ae1d48b2 3643 .doit = ip_vs_genl_set_daemon,
9a812198
JV		 3644 },
3645 {
3646 .cmd = IPVS_CMD_GET_DAEMON,
3647 .flags = GENL_ADMIN_PERM,
3648 .dumpit = ip_vs_genl_dump_daemons,
3649 },
3650 {
3651 .cmd = IPVS_CMD_SET_CONFIG,
3652 .flags = GENL_ADMIN_PERM,
3653 .policy = ip_vs_cmd_policy,
3654 .doit = ip_vs_genl_set_cmd,
3655 },
3656 {
3657 .cmd = IPVS_CMD_GET_CONFIG,
3658 .flags = GENL_ADMIN_PERM,
3659 .doit = ip_vs_genl_get_cmd,
3660 },
3661 {
3662 .cmd = IPVS_CMD_GET_INFO,
3663 .flags = GENL_ADMIN_PERM,
3664 .doit = ip_vs_genl_get_cmd,
3665 },
3666 {
3667 .cmd = IPVS_CMD_ZERO,
3668 .flags = GENL_ADMIN_PERM,
3669 .policy = ip_vs_cmd_policy,
3670 .doit = ip_vs_genl_set_cmd,
3671 },
3672 {
3673 .cmd = IPVS_CMD_FLUSH,
3674 .flags = GENL_ADMIN_PERM,
3675 .doit = ip_vs_genl_set_cmd,
3676 },
3677};
3678
3679static int __init ip_vs_genl_register(void)
3680{
8f698d54 3681 return genl_register_family_with_ops(&ip_vs_genl_family,
c53ed742 3682 ip_vs_genl_ops);
9a812198
JV		 3683}
3684
3685static void ip_vs_genl_unregister(void)
3686{
3687 genl_unregister_family(&ip_vs_genl_family);
3688}
3689
3690/* End of Generic Netlink interface definitions */
3691
61b1ab45
HS		 3692/*
3693 * per netns intit/exit func.
3694 */
14e40546 3695#ifdef CONFIG_SYSCTL
2b2d2808 3696static int __net_init ip_vs_control_net_init_sysctl(struct net *net)
61b1ab45 3697{
fc723250
HS		 3698 int idx;
3699 struct netns_ipvs *ipvs = net_ipvs(net);
a0840e2e 3700 struct ctl_table *tbl;
fc723250 3701
a0840e2e
HS		 3702 atomic_set(&ipvs->dropentry, 0);
3703 spin_lock_init(&ipvs->dropentry_lock);
3704 spin_lock_init(&ipvs->droppacket_lock);
3705 spin_lock_init(&ipvs->securetcp_lock);
a0840e2e
HS		 3706
3707 if (!net_eq(net, &init_net)) {
3708 tbl = kmemdup(vs_vars, sizeof(vs_vars), GFP_KERNEL);
3709 if (tbl == NULL)
14e40546 3710 return -ENOMEM;
464dc801
EB		 3711
3712 /* Don't export sysctls to unprivileged users */
3713 if (net->user_ns != &init_user_ns)
3714 tbl[0].procname = NULL;
a0840e2e
HS		 3715 } else
3716 tbl = vs_vars;
3717 /* Initialize sysctl defaults */
3718 idx = 0;
3719 ipvs->sysctl_amemthresh = 1024;
3720 tbl[idx++].data = &ipvs->sysctl_amemthresh;
3721 ipvs->sysctl_am_droprate = 10;
3722 tbl[idx++].data = &ipvs->sysctl_am_droprate;
3723 tbl[idx++].data = &ipvs->sysctl_drop_entry;
3724 tbl[idx++].data = &ipvs->sysctl_drop_packet;
3725#ifdef CONFIG_IP_VS_NFCT
3726 tbl[idx++].data = &ipvs->sysctl_conntrack;
3727#endif
3728 tbl[idx++].data = &ipvs->sysctl_secure_tcp;
3729 ipvs->sysctl_snat_reroute = 1;
3730 tbl[idx++].data = &ipvs->sysctl_snat_reroute;
3731 ipvs->sysctl_sync_ver = 1;
3732 tbl[idx++].data = &ipvs->sysctl_sync_ver;
f73181c8
PNA		 3733 ipvs->sysctl_sync_ports = 1;
3734 tbl[idx++].data = &ipvs->sysctl_sync_ports;
4d0c875d 3735 tbl[idx++].data = &ipvs->sysctl_sync_persist_mode;
1c003b15
PNA		 3736 ipvs->sysctl_sync_qlen_max = nr_free_buffer_pages() / 32;
3737 tbl[idx++].data = &ipvs->sysctl_sync_qlen_max;
3738 ipvs->sysctl_sync_sock_size = 0;
3739 tbl[idx++].data = &ipvs->sysctl_sync_sock_size;
a0840e2e
HS		 3740 tbl[idx++].data = &ipvs->sysctl_cache_bypass;
3741 tbl[idx++].data = &ipvs->sysctl_expire_nodest_conn;
c6c96c18
AF		 3742 tbl[idx++].data = &ipvs->sysctl_sloppy_tcp;
3743 tbl[idx++].data = &ipvs->sysctl_sloppy_sctp;
a0840e2e 3744 tbl[idx++].data = &ipvs->sysctl_expire_quiescent_template;
59e0350e
SH		 3745 ipvs->sysctl_sync_threshold[0] = DEFAULT_SYNC_THRESHOLD;
3746 ipvs->sysctl_sync_threshold[1] = DEFAULT_SYNC_PERIOD;
a0840e2e
HS		 3747 tbl[idx].data = &ipvs->sysctl_sync_threshold;
3748 tbl[idx++].maxlen = sizeof(ipvs->sysctl_sync_threshold);
749c42b6
JA		 3749 ipvs->sysctl_sync_refresh_period = DEFAULT_SYNC_REFRESH_PERIOD;
3750 tbl[idx++].data = &ipvs->sysctl_sync_refresh_period;
3751 ipvs->sysctl_sync_retries = clamp_t(int, DEFAULT_SYNC_RETRIES, 0, 3);
3752 tbl[idx++].data = &ipvs->sysctl_sync_retries;
a0840e2e 3753 tbl[idx++].data = &ipvs->sysctl_nat_icmp_send;
3654e611
JA		 3754 ipvs->sysctl_pmtu_disc = 1;
3755 tbl[idx++].data = &ipvs->sysctl_pmtu_disc;
0c12582f 3756 tbl[idx++].data = &ipvs->sysctl_backup_only;
a0840e2e
HS		 3757
3758
ec8f23ce 3759 ipvs->sysctl_hdr = register_net_sysctl(net, "net/ipv4/vs", tbl);
0443929f
SH		 3760 if (ipvs->sysctl_hdr == NULL) {
3761 if (!net_eq(net, &init_net))
3762 kfree(tbl);
14e40546 3763 return -ENOMEM;
0443929f 3764 }
6ef757f9 3765 ip_vs_start_estimator(net, &ipvs->tot_stats);
a0840e2e 3766 ipvs->sysctl_tbl = tbl;
f6340ee0
HS		 3767 /* Schedule defense work */
3768 INIT_DELAYED_WORK(&ipvs->defense_work, defense_work_handler);
3769 schedule_delayed_work(&ipvs->defense_work, DEFENSE_TIMER_PERIOD);
61b1ab45 3770
61b1ab45 3771 return 0;
61b1ab45
HS		 3772}
3773
2b2d2808 3774static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net)
61b1ab45 3775{
b17fc996
HS		 3776 struct netns_ipvs *ipvs = net_ipvs(net);
3777
f2431e6e
HS		 3778 cancel_delayed_work_sync(&ipvs->defense_work);
3779 cancel_work_sync(&ipvs->defense_work.work);
a0840e2e 3780 unregister_net_sysctl_table(ipvs->sysctl_hdr);
14e40546
SH		 3781}
3782
3783#else
3784
2b2d2808
CG		 3785static int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; }
3786static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net) { }
14e40546 3787
0443929f 3788#endif
14e40546 3789
7a4f0761
HS		 3790static struct notifier_block ip_vs_dst_notifier = {
3791 .notifier_call = ip_vs_dst_event,
3792};
3793
503cf15a 3794int __net_init ip_vs_control_net_init(struct net *net)
14e40546 3795{
827da44c 3796 int i, idx;
14e40546
SH		 3797 struct netns_ipvs *ipvs = net_ipvs(net);
3798
14e40546
SH		 3799 /* Initialize rs_table */
3800 for (idx = 0; idx < IP_VS_RTAB_SIZE; idx++)
276472ea 3801 INIT_HLIST_HEAD(&ipvs->rs_table[idx]);
14e40546
SH		 3802
3803 INIT_LIST_HEAD(&ipvs->dest_trash);
578bc3ef
JA		 3804 spin_lock_init(&ipvs->dest_trash_lock);
3805 setup_timer(&ipvs->dest_trash_timer, ip_vs_dest_trash_expire,
3806 (unsigned long) net);
14e40546
SH		 3807 atomic_set(&ipvs->ftpsvc_counter, 0);
3808 atomic_set(&ipvs->nullsvc_counter, 0);
3809
3810 /* procfs stats */
3811 ipvs->tot_stats.cpustats = alloc_percpu(struct ip_vs_cpu_stats);
0a9ee813 3812 if (!ipvs->tot_stats.cpustats)
14e40546 3813 return -ENOMEM;
0a9ee813 3814
827da44c
JS		 3815 for_each_possible_cpu(i) {
3816 struct ip_vs_cpu_stats *ipvs_tot_stats;
3817 ipvs_tot_stats = per_cpu_ptr(ipvs->tot_stats.cpustats, i);
3818 u64_stats_init(&ipvs_tot_stats->syncp);
3819 }
3820
14e40546
SH		 3821 spin_lock_init(&ipvs->tot_stats.lock);
3822
d4beaa66
G		 3823 proc_create("ip_vs", 0, net->proc_net, &ip_vs_info_fops);
3824 proc_create("ip_vs_stats", 0, net->proc_net, &ip_vs_stats_fops);
3825 proc_create("ip_vs_stats_percpu", 0, net->proc_net,
3826 &ip_vs_stats_percpu_fops);
14e40546 3827
503cf15a 3828 if (ip_vs_control_net_init_sysctl(net))
14e40546
SH		 3829 goto err;
3830
3831 return 0;
3832
3833err:
2a0751af 3834 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 3835 return -ENOMEM;
3836}
3837
503cf15a 3838void __net_exit ip_vs_control_net_cleanup(struct net *net)
61b1ab45 3839{
b17fc996
HS		 3840 struct netns_ipvs *ipvs = net_ipvs(net);
3841
f2431e6e 3842 ip_vs_trash_cleanup(net);
6ef757f9 3843 ip_vs_stop_estimator(net, &ipvs->tot_stats);
503cf15a 3844 ip_vs_control_net_cleanup_sysctl(net);
ece31ffd
G		 3845 remove_proc_entry("ip_vs_stats_percpu", net->proc_net);
3846 remove_proc_entry("ip_vs_stats", net->proc_net);
3847 remove_proc_entry("ip_vs", net->proc_net);
2a0751af 3848 free_percpu(ipvs->tot_stats.cpustats);
61b1ab45
HS		 3849}
3850
8537de8a 3851int __init ip_vs_register_nl_ioctl(void)
1da177e4 3852{
fc723250 3853 int ret;
1da177e4 3854
1da177e4
LT		 3855 ret = nf_register_sockopt(&ip_vs_sockopts);
3856 if (ret) {
1e3e238e 3857 pr_err("cannot register sockopt.\n");
7a4f0761 3858 goto err_sock;
1da177e4
LT		 3859 }
3860
9a812198
JV		 3861 ret = ip_vs_genl_register();
3862 if (ret) {
1e3e238e 3863 pr_err("cannot register Generic Netlink interface.\n");
7a4f0761 3864 goto err_genl;
9a812198 3865 }
1da177e4 3866 return 0;
fc723250 3867
7a4f0761
HS		 3868err_genl:
3869 nf_unregister_sockopt(&ip_vs_sockopts);
3870err_sock:
fc723250 3871 return ret;
1da177e4
LT		 3872}
3873
8537de8a
HS		 3874void ip_vs_unregister_nl_ioctl(void)
3875{
3876 ip_vs_genl_unregister();
3877 nf_unregister_sockopt(&ip_vs_sockopts);
3878}
3879
3880int __init ip_vs_control_init(void)
3881{
3882 int idx;
3883 int ret;
3884
3885 EnterFunction(2);
3886
276472ea 3887 /* Initialize svc_table, ip_vs_svc_fwm_table */
8537de8a 3888 for (idx = 0; idx < IP_VS_SVC_TAB_SIZE; idx++) {
ceec4c38
JA		 3889 INIT_HLIST_HEAD(&ip_vs_svc_table[idx]);
3890 INIT_HLIST_HEAD(&ip_vs_svc_fwm_table[idx]);
8537de8a
HS		 3891 }
3892
3893 smp_wmb(); /* Do we really need it now ? */
3894
3895 ret = register_netdevice_notifier(&ip_vs_dst_notifier);
3896 if (ret < 0)
3897 return ret;
3898
3899 LeaveFunction(2);
3900 return 0;
3901}
3902
1da177e4
LT		 3903
3904void ip_vs_control_cleanup(void)
3905{
3906 EnterFunction(2);
7676e345 3907 unregister_netdevice_notifier(&ip_vs_dst_notifier);
1da177e4
LT		 3908 LeaveFunction(2);
3909}
Linux kernel - Deliverables
This page took 1.1639 seconds and 5 git commands to generate.